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Rated for the actuator's continuous torque/load class.", "purchaseUrl": "", "estimatedCost": 2, "printSettings": "30% infill, 0.2mm layer, 4 perimeters" }, { "id": "bme680_sensor", "name": "BME680 Environmental Sensor", "pins": [ "VIN", "3V3", "GND", "SCK", "SDI", "CS", "SDO" ], "type": "sensor", "ebayUrl": "https://www.ebay.com/sch/i.html?_nkw=Bosch+BME680+Breakout+Board&_sacat=0&_from=R40&mkcid=1&mkrid=711-53200-19255-0&siteid=0&campid=5339153059&customid=blueprint&toolid=10001&mkevt=1", "category": "electrical", "imageUrl": "https://m.media-amazon.com/images/I/51t37e1ZtkL._SL500_.jpg", "quantity": 1, "description": "High-accuracy gas, pressure, temperature, and humidity sensor for advanced telemetry.", "productName": "Bosch BME680 Breakout Board", "purchaseUrl": "https://www.adafruit.com/product/3660", "estimatedCost": 15 }, { "id": "bme680_sensor_mount", "name": "BME680 Sensor Mount", "type": "3d_printed", "category": "mechanical", "quantity": 1, "description": "3D printed mount custom-fit for the BME680 sensor breakout board.", "productName": "Custom 3D Printed BME680 Mount", "purchaseUrl": "https://www.thingiverse.com/", "estimatedCost": 2 } ], "notes": [ "5x5 inch footprint", "polycarbonate enclosure", "solar powered", "sub GHz radio", "icosahedron octahedron shape", "external antenna", "weatherproof enclosure", "deep sleep focus on board sleep" ], "assembly": { "version": 2, "joints": [ { "id": "mig-internal_electronics_sled-base_board", "parent": { "part": "internal_electronics_sled" }, "child": { "part": "base_board" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": -27.5, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-bme680_sensor_mount-bme680_sensor", "parent": { "part": "bme680_sensor_mount" }, "child": { "part": "bme680_sensor" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 5, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-internal_electronics_sled-bme680_sensor_mount", "parent": { "part": "internal_electronics_sled" }, "child": { "part": "bme680_sensor_mount" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 15, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-octahedron_bottom_shell-gore_vent", "parent": { "part": "octahedron_bottom_shell" }, "child": { "part": "gore_vent" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 40, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-patch_antenna_bracket-internal_antenna", "parent": { "part": "patch_antenna_bracket" }, "child": { "part": "internal_antenna" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 0, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-octahedron_bottom_shell-internal_electronics_sled", "parent": { "part": "octahedron_bottom_shell" }, "child": { "part": "internal_electronics_sled" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 67.5, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-lora_mcu_mount-lora_mcu", "parent": { "part": "lora_mcu_mount" }, "child": { "part": "lora_mcu" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 0, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-internal_electronics_sled-lora_mcu_mount", "parent": { "part": "internal_electronics_sled" }, "child": { "part": "lora_mcu_mount" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 28.5, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-lto_battery_cradle-lto_battery", "parent": { "part": "lto_battery_cradle" }, "child": { "part": "lto_battery" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 0, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-internal_electronics_sled-lto_battery_cradle", "parent": { "part": "internal_electronics_sled" }, "child": { "part": "lto_battery_cradle" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 0, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-silicone_gasket_cord-mppt_charger", "parent": { "part": "silicone_gasket_cord" }, "child": { "part": "mppt_charger" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 0, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-silicone_gasket_cord-octahedron_bottom_shell", "parent": { "part": "silicone_gasket_cord" }, "child": { "part": "octahedron_bottom_shell" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": -45, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-octahedron_bottom_shell-octahedron_top_shell", "parent": { "part": "octahedron_bottom_shell" }, "child": { "part": "octahedron_top_shell" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 90, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-octahedron_top_shell-patch_antenna_bracket", "parent": { "part": "octahedron_top_shell" }, "child": { "part": "patch_antenna_bracket" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 0, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-relay_module_mount-relay_module", "parent": { "part": "relay_module_mount" }, "child": { "part": "relay_module" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 0, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-internal_electronics_sled-relay_module_mount", "parent": { "part": "internal_electronics_sled" }, "child": { "part": "relay_module_mount" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 32.5, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } }, { "id": "mig-octahedron_top_shell-solar_panel", "parent": { "part": "octahedron_top_shell" }, "child": { "part": "solar_panel" }, "type": "rigid", "offset": { "translation": { "x": 0, "y": 46.5, "z": 0 }, "rotationDeg": { "x": 0, "y": 0, "z": 0 } } } ] }, "projectName": "Solar LTO Sensor Node", "originalPrompt": "Yes — for a solar-powered **sensor + relay** node, the hardware is very achievable, but “indefinitely” only works if the average power stays tiny and the enclosure is designed around the solar budget rather than around the electronics alone. [news.rakwireless](https://news.rakwireless.com/how-to-access-lorawan-using-solar-energy/)\n## What the hardware should be\nA practical node stack looks like this:\n- Low-power MCU with sub-GHz radio.\n- Small environmental sensor set.\n- Solar panel matched to the load.\n- Rechargeable battery buffer.\n- Charge controller with low quiescent current.\n- RF-transparent outdoor enclosure.\n- External or carefully isolated antenna.\n\nThis is the same basic structure used in outdoor LoRaWAN and Meshtastic solar builds: solar panel, battery, charge management, radio board, and weatherproof enclosure. [news.rakwireless](https://news.rakwireless.com/how-to-access-lorawan-using-solar-energy/)\n## Power reality\nFor a 5x5 inch top surface in a traction building 3D shape that is harmonious with RF design itself like a icosahedron or an octahedron the solar ceiling is modest. Using a conservative panel output estimate, that footprint can produce roughly 2.7 W peak and about 8.2 Wh per sunny day in good conditions. That is enough for a very low-power node, but not for a chatty relay or anything with continuous radio activity. [thinkrobotics](https://thinkrobotics.com/blogs/learn/designing-solar-powered-iot-devices-a-comprehensive-guide)\n\nA useful rule of thumb:\n- **Average 0.05 W:** very easy to sustain.\n- **Average 0.1 W:** still realistic.\n- **Average 0.2 W:** possible, but needs careful design and good sun.\n- **Average 0.5 W:** too much for comfort in this footprint unless conditions are excellent.\n\nThat means the node must spend most of its life asleep and wake only briefly to sample or relay. [ti](https://www.ti.com/lit/pdf/ssztcl1)\n## Solar enclosure design\nThe enclosure should be designed so that the panel, antenna, and electronics do not fight each other.\n\nRecommended mechanical layout:\n- **Top face:** solar panel.\n- **Upper edge or separate mast:** antenna.\n- **Center cavity:** battery and board.\n- **Lower face:** sensor vents or protected sampling ports.\n- **Gasketed lid:** sealed against rain and dust.\n- **UV-stable plastic shell:** not bare metal for the main body.\n\nFor wireless devices, non-metallic enclosures are preferred because polycarbonate and ABS are RF-friendly, while metal shells block RF unless you intentionally create an RF window or use an external antenna. [eabel](https://www.eabel.com/how-to-choose-the-best-enclosure-material-for-wireless-controls/)\n## Why not full aluminum\nAluminum is good mechanically, but it creates RF problems unless the antenna is external or isolated behind a window. A fully metallic shell behaves like a Faraday cage and reduces internal antenna performance dramatically. So if you want cheap abundance and easy radio tuning, use **UV-stable polycarbonate** or ABS for the main housing, and reserve metal only for mounts, shielding, or heat spreaders where needed. [eabel](https://www.eabel.com/how-to-choose-the-best-enclosure-material-for-wireless-controls/)\n## Battery and autonomy\nIndefinite solar operation means the battery is just a buffer, not the primary energy source. The battery should cover:\n- night operation,\n- cloudy periods,\n- brief high-load bursts,\n- and startup surges.\n\nA tiny node can work with a small lithium cell or 18650-class pack if the average load is low enough, and solar IoT designs commonly pair compact panels with battery storage for off-grid uptime. [news.rakwireless](https://news.rakwireless.com/how-to-access-lorawan-using-solar-energy/)\n## Best configuration for your case\nThe strongest first build is:\n\n- **Board:** low-power LoRa/sub-GHz module.\n- **Sensors:** temperature, humidity, pressure, maybe light or gas.\n- **Power:** 3 W class solar panel plus rechargeable battery.\n- **Enclosure:** UV-stable polycarbonate outdoor shell.\n- **Antenna:** external or top-mounted to avoid enclosure losses.\n- **Firmware:** deep sleep, periodic beacon, event-triggered relay.\n\nThat matches what solar LoRa node builders are already doing in field projects: small panel, battery, waterproof case, sealed cable entry, and an antenna brought out of the enclosure. [thethingsnetwork](https://www.thethingsnetwork.org/forum/t/solar-powered-lorawan-gateway-howto/40783)\n## Size verdict\nA 5x5 inch form factor is enough for a **sensor-relay seed node** if:\n- the radio is low-power,\n- the duty cycle is very low,\n- the antenna is not buried in metal,\n- and the solar exposure is good.\n\nIt is not enough for a power-hungry mesh relay or a node that talks too often. In other words: the hardware is feasible, but the network protocol must be designed to be sparse and efficient. [youtube](https://www.youtube.com/watch?v=1XyBj_Z7ZDc)\n## Best next hardware step\nThe smartest prototype path is:\n1. Build a bench prototype around a low-power LoRa board.\n2. Measure actual average wattage.\n3. Move the same electronics into a UV-stable sealed enclosure.\n4. Add a solar panel sized to exceed the measured load by a healthy margin.\n5. Test it outdoors for several weeks before scaling.\n\nThat sequence is how you find the real autonomy boundary before committing to a production enclosure. [thethingsnetwork](https://www.thethingsnetwork.org/forum/t/solar-powered-lorawan-gateway-howto/40783)\n\nIf you want, I can turn this into a **specific enclosure and BOM concept** for a 5x5 inch node, including panel size, battery size, antenna placement, and a recommended enclosure geometry.", "instructionSteps": [ { "id": "fabricate", "subSteps": [ { "id": "fabricate_1", "title": "3D print enclosure shells and internal mounting brackets", "partIds": [ "octahedron_top_shell", "octahedron_bottom_shell", "internal_electronics_sled", "lto_battery_cradle", "patch_antenna_bracket", "lora_mcu_mount", "relay_module_mount", "bme680_sensor_mount" ] }, { "id": "fabricate_2", "title": "Install M3 brass heat-set inserts into bottom shell and electronics sled", "partIds": [ "brass_threaded_inserts", "octahedron_bottom_shell", "internal_electronics_sled" ] }, { "id": "fabricate_3", "title": "Install the silicone gasket cord into the bottom shell groove", "partIds": [ "silicone_gasket_cord", "octahedron_bottom_shell" ] }, { "id": "fabricate_4", "title": "Mount the pressure equalizing Gore vent into the bottom shell", "partIds": [ "gore_vent", "octahedron_bottom_shell" ] } ] }, { "id": "wire", "subSteps": [ { "id": "wire_1", "title": "Solder solar panel output leads to the MPPT charger input", "partIds": [ "solar_panel", "mppt_charger" ] }, { "id": "wire_2", "title": "Wire MPPT charger outputs to LTO battery and WisBlock base board", "partIds": [ "mppt_charger", "lto_battery", "base_board" ] }, { "id": "wire_3", "title": "Wire power and I2C lines from WisBlock Base Board to BME680 sensor", "partIds": [ "base_board", "lora_mcu", "bme680_sensor" ] }, { "id": "wire_4", "title": "Wire the relay module coil pins to the LoRa MCU and WisBlock base board", "partIds": [ "base_board", "lora_mcu", "relay_module" ] }, { "id": "wire_5", "title": "Connect RF feed and ground from LoRa MCU to internal patch antenna", "partIds": [ "lora_mcu", "internal_antenna" ] } ] }, { "id": "bringup", "subSteps": [ { "id": "bringup_1", "title": "Verify battery charge voltage and MPPT output with multimeter", "partIds": [ "mppt_charger", "lto_battery", "base_board" ] }, { "id": "bringup_2", "title": "Upload test sketch to scan I2C bus and verify BME680 detection", "partIds": [ "lora_mcu", "bme680_sensor" ] }, { "id": "bringup_3", "title": "Test low-power relay triggering code and measure deep sleep currents", "partIds": [ "lora_mcu", "relay_module" ] }, { "id": "bringup_4", "title": "Perform LoRaWAN join sequence test to confirm antenna and RF circuit", "partIds": [ "lora_mcu", "internal_antenna" ] } ] }, { "id": "assemble", "subSteps": [ { "id": "assemble_1", "title": "Secure BME680, LoRa MCU, and Relay Module to their respective 3D mounts", "partIds": [ "bme680_sensor", "bme680_sensor_mount", "lora_mcu", "lora_mcu_mount", "relay_module", "relay_module_mount" ] }, { "id": "assemble_2", "title": "Mount the base board, battery cradle, and modular mounts to the internal electronics sled", "partIds": [ "internal_electronics_sled", "base_board", "lto_battery_cradle", "lto_battery", "lora_mcu_mount", "relay_module_mount", "bme680_sensor_mount", "board_mounting_screws" ] }, { "id": "assemble_3", "title": "Mount top solar panel and slide patch antenna bracket into top shell guide slots", "partIds": [ "octahedron_top_shell", "solar_panel", "patch_antenna_bracket", "internal_antenna" ] }, { "id": "assemble_4", "title": "Secure electronics sled into bottom shell, connect remaining sub-assemblies, and fasten top shell", "partIds": [ "internal_electronics_sled", "octahedron_bottom_shell", "octahedron_top_shell", "shell_fastening_screws" ] } ] } ], "wiringCleanedHash": "75f9c0c8-53db-4789-b086-f53cbd7bcaa8::base_board:SYS_5V|3V3|GND|I2C_SDA|I2C_SCL|A0|AIN0|SOLAR_IN|BATT_IN,bme680_sensor:VIN|3V3|GND|SCK|SDI|CS|SDO,internal_antenna:RF_FEED|GND,lora_mcu:3V3|GND|I2C_SDA|I2C_SCL|TXD|RXD|AIN0|RST|ANTENNA_RF,lto_battery:ANODE|CATHODE,mppt_charger:VIN_DC|VSTOR|VBAT|VBAT_OV|VBAT_UV|GND,relay_module:COIL_PLUS|COIL_MINUS|COM|NO|NC,solar_panel:POS|NEG::data|lora_mcu|AIN0|relay_module|COIL_PLUS|gpio|;data|lora_mcu|ANTENNA_RF|internal_antenna|RF_FEED||0.1V_RF_signal_level_approximate;data|lora_mcu|I2C_SCL|base_board|I2C_SCL|i2c|;data|lora_mcu|I2C_SCL|bme680_sensor|SCK|i2c|;data|lora_mcu|I2C_SDA|base_board|I2C_SDA|i2c|;data|lora_mcu|I2C_SDA|bme680_sensor|SDI|i2c|;power|base_board|3V3|bme680_sensor|3V3||3.3V;power|base_board|3V3|lora_mcu|3V3||3.3V;power|base_board|3V3|relay_module|COM||3.3V;power|base_board|GND|bme680_sensor|GND||0V;power|base_board|GND|lora_mcu|GND||;power|base_board|GND|relay_module|COIL_MINUS||;power|lora_mcu|GND|internal_antenna|GND||0V;power|lto_battery|CATHODE|mppt_charger|GND||0V;power|mppt_charger|GND|base_board|GND||;power|mppt_charger|VBAT|lto_battery|ANODE||2.4V;power|mppt_charger|VSTOR|base_board|SOLAR_IN||3.3V;power|solar_panel|NEG|mppt_charger|GND||;power|solar_panel|POS|mppt_charger|VIN_DC||5.5V", "projectDescription": "Constructed inside a compact, weatherproof polycarbonate enclosure, this solar-powered environmental monitor uses a BME680 sensor to track localized climate metrics. The system leverages a low-power LoRaWAN microcontroller, sub-GHz radio, and LTO battery charged via MPPT to sustain ultra-low-power deep sleep cycles indefinitely.", "imagePromptSnapshot": { "description": "Yes — for a solar-powered **sensor + relay** node, the hardware is very achievable, but “indefinitely” only works if the average power stays tiny and the enclosure is designed around the solar budget rather than around the electronics alone. [news.rakwireless](https://news.rakwireless.com/how-to-access-lorawan-using-solar-energy/)\n## What the hardware should be\nA practical node stack looks like this:\n- Low-power MCU with sub-GHz radio.\n- Small environmental sensor set.\n- Solar panel matched to the load.\n- Rechargeable battery buffer.\n- Charge controller with low quiescent current.\n- RF-transparent outdoor enclosure.\n- External or carefully isolated antenna.\n\nThis is the same basic structure used in outdoor LoRaWAN and Meshtastic solar builds: solar panel, battery, charge management, radio board, and weatherproof enclosure. [news.rakwireless](https://news.rakwireless.com/how-to-access-lorawan-using-solar-energy/)\n## Power reality\nFor a 5x5 inch top surface in a traction building 3D shape that is harmonious with RF design itself like a icosahedron or an octahedron the solar ceiling is modest. Using a conservative panel output estimate, that footprint can produce roughly 2.7 W peak and about 8.2 Wh per sunny day in good conditions. That is enough for a very low-power node, but not for a chatty relay or anything with continuous radio activity. [thinkrobotics](https://thinkrobotics.com/blogs/learn/designing-solar-powered-iot-devices-a-comprehensive-guide)\n\nA useful rule of thumb:\n- **Average 0.05 W:** very easy to sustain.\n- **Average 0.1 W:** still realistic.\n- **Average 0.2 W:** possible, but needs careful design and good sun.\n- **Average 0.5 W:** too much for comfort in this footprint unless conditions are excellent.\n\nThat means the node must spend most of its life asleep and wake only briefly to sample or relay. [ti](https://www.ti.com/lit/pdf/ssztcl1)\n## Solar enclosure design\nThe enclosure should be designed so that the panel, antenna, and electronics do not fight each other.\n\nRecommended mechanical layout:\n- **Top face:** solar panel.\n- **Upper edge or separate mast:** antenna.\n- **Center cavity:** battery and board.\n- **Lower face:** sensor vents or protected sampling ports.\n- **Gasketed lid:** sealed against rain and dust.\n- **UV-stable plastic shell:** not bare metal for the main body.\n\nFor wireless devices, non-metallic enclosures are preferred because polycarbonate and ABS are RF-friendly, while metal shells block RF unless you intentionally create an RF window or use an external antenna. [eabel](https://www.eabel.com/how-to-choose-the-best-enclosure-material-for-wireless-controls/)\n## Why not full aluminum\nAluminum is good mechanically, but it creates RF problems unless the antenna is external or isolated behind a window. A fully metallic shell behaves like a Faraday cage and reduces internal antenna performance dramatically. So if you want cheap abundance and easy radio tuning, use **UV-stable polycarbonate** or ABS for the main housing, and reserve metal only for mounts, shielding, or heat spreaders where needed. [eabel](https://www.eabel.com/how-to-choose-the-best-enclosure-material-for-wireless-controls/)\n## Battery and autonomy\nIndefinite solar operation means the battery is just a buffer, not the primary energy source. The battery should cover:\n- night operation,\n- cloudy periods,\n- brief high-load bursts,\n- and startup surges.\n\nA tiny node can work with a small lithium cell or 18650-class pack if the average load is low enough, and solar IoT designs commonly pair compact panels with battery storage for off-grid uptime. [news.rakwireless](https://news.rakwireless.com/how-to-access-lorawan-using-solar-energy/)\n## Best configuration for your case\nThe strongest first build is:\n\n- **Board:** low-power LoRa/sub-GHz module.\n- **Sensors:** temperature, humidity, pressure, maybe light or gas.\n- **Power:** 3 W class solar panel plus rechargeable battery.\n- **Enclosure:** UV-stable polycarbonate outdoor shell.\n- **Antenna:** external or top-mounted to avoid enclosure losses.\n- **Firmware:** deep sleep, periodic beacon, event-triggered relay.\n\nThat matches what solar LoRa node builders are already doing in field projects: small panel, battery, waterproof case, sealed cable entry, and an antenna brought out of the enclosure. [thethingsnetwork](https://www.thethingsnetwork.org/forum/t/solar-powered-lorawan-gateway-howto/40783)\n## Size verdict\nA 5x5 inch form factor is enough for a **sensor-relay seed node** if:\n- the radio is low-power,\n- the duty cycle is very low,\n- the antenna is not buried in metal,\n- and the solar exposure is good.\n\nIt is not enough for a power-hungry mesh relay or a node that talks too often. In other words: the hardware is feasible, but the network protocol must be designed to be sparse and efficient. [youtube](https://www.youtube.com/watch?v=1XyBj_Z7ZDc)\n## Best next hardware step\nThe smartest prototype path is:\n1. Build a bench prototype around a low-power LoRa board.\n2. Measure actual average wattage.\n3. Move the same electronics into a UV-stable sealed enclosure.\n4. Add a solar panel sized to exceed the measured load by a healthy margin.\n5. Test it outdoors for several weeks before scaling.\n\nThat sequence is how you find the real autonomy boundary before committing to a production enclosure. [thethingsnetwork](https://www.thethingsnetwork.org/forum/t/solar-powered-lorawan-gateway-howto/40783)\n\nIf you want, I can turn this into a **specific enclosure and BOM concept** for a 5x5 inch node, including panel size, battery size, antenna placement, and a recommended enclosure geometry.", "tags": [ "5x5 inch footprint", "polycarbonate enclosure", "solar powered", "sub GHz radio", "icosahedron octahedron shape", "external antenna", "weatherproof enclosure", "deep sleep focus on board sleep" ], "technicalDescription": "Constructed inside a compact, weatherproof polycarbonate enclosure, this solar-powered environmental monitor uses a BME680 sensor to track localized climate metrics. The system leverages a low-power LoRaWAN microcontroller, sub-GHz radio, and LTO battery charged via MPPT to sustain ultra-low-power deep sleep cycles indefinitely." }, "instructionPreamble": { "tools": [ "Soldering iron with fine tip", "Brass heat-set insert installation tip", "M3 hex key", "M2.5 hex key", "M2 hex key", "Wire strippers", "Multimeter", "3D printer (ASA and PETG capable)" ], "assumptions": [ "3D printing slicing software is set up for ASA and PETG materials.", "Basic electronics soldering experience and safety equipment are available.", "Arduino IDE or VS Code/PlatformIO is installed with required LoRaWAN and BME680 libraries." ] }, "electricalConnections": [ { "type": "data", "label": "Relay control pin", "source": "lora_mcu", "target": "relay_module", "protocol": "gpio", "sourcePin": "AIN0", "targetPin": "COIL_PLUS" }, { "type": "power", "source": "base_board", "target": "bme680_sensor", "voltage": "3.3V", "sourcePin": "3V3", "targetPin": "3V3" }, { "type": "power", "source": "base_board", "target": "bme680_sensor", "voltage": "0V", "sourcePin": "GND", "targetPin": "GND" }, { "type": "data", "source": "lora_mcu", "target": "bme680_sensor", "protocol": "i2c", "sourcePin": "I2C_SDA", "targetPin": "SDI" }, { "type": "data", "source": "lora_mcu", "target": "bme680_sensor", "protocol": "i2c", "sourcePin": "I2C_SCL", "targetPin": "SCK" }, { "type": "data", "source": "lora_mcu", "target": "internal_antenna", "voltage": "0.1V_RF_signal_level_approximate", "sourcePin": "ANTENNA_RF", "targetPin": "RF_FEED" }, { "type": "power", "source": "lora_mcu", "target": "internal_antenna", "voltage": "0V", "sourcePin": "GND", "targetPin": "GND" }, { "type": "power", "source": "solar_panel", "target": "mppt_charger", "sourcePin": "NEG", "targetPin": "GND" }, { "type": "power", "source": "mppt_charger", "target": "base_board", "sourcePin": "GND", "targetPin": "GND" }, { "type": "power", "source": "base_board", "target": "lora_mcu", "sourcePin": "GND", "targetPin": "GND" }, { "type": "power", "source": "base_board", "target": "relay_module", "sourcePin": "GND", "targetPin": "COIL_MINUS" }, { "type": "power", "source": "solar_panel", "target": "mppt_charger", "voltage": "5.5V", "sourcePin": "POS", "targetPin": "VIN_DC" }, { "type": "power", "source": "mppt_charger", "target": "lto_battery", "voltage": "2.4V", "sourcePin": "VBAT", "targetPin": "ANODE" }, { "type": "power", "source": "lto_battery", "target": "mppt_charger", "voltage": "0V", "sourcePin": "CATHODE", "targetPin": "GND" }, { "type": "power", "source": "mppt_charger", "target": "base_board", "voltage": "3.3V", "sourcePin": "VSTOR", "targetPin": "SOLAR_IN" }, { "type": "power", "source": "base_board", "target": "lora_mcu", "voltage": "3.3V", "sourcePin": "3V3", "targetPin": "3V3" }, { "type": "power", "source": "base_board", "target": "relay_module", "voltage": "3.3V", "sourcePin": "3V3", "targetPin": "COM" }, { "type": "data", "source": "lora_mcu", "target": "base_board", "protocol": "i2c", "sourcePin": "I2C_SDA", "targetPin": "I2C_SDA" }, { "type": "data", "source": "lora_mcu", "target": "base_board", "protocol": "i2c", "sourcePin": "I2C_SCL", "targetPin": "I2C_SCL" } ], "mechanicalConnections": [ { "delta": { "x": 0, "y": -90, "z": 0 }, "label": "M3 Shell Assembly Screws into Heat-Set Inserts", "source": "octahedron_top_shell", "target": "octahedron_bottom_shell" }, { "delta": { "x": 0, "y": -45, "z": 0 }, "label": "Pressed into groove", "source": "silicone_gasket_cord", "target": "octahedron_bottom_shell" }, { "delta": { "x": 0, "y": -43, "z": 0 }, "label": "Heat-set installation", "source": "brass_threaded_inserts", "target": "octahedron_bottom_shell" }, { "delta": { "x": 0, "y": 0, "z": 0 }, "label": "Thru-hole clearance", "source": "shell_fastening_screws", "target": "octahedron_top_shell" }, { "delta": { "x": 0, "y": -40, "z": 0 }, "label": "Threaded install with O-ring", "source": "gore_vent", "target": "octahedron_bottom_shell" }, { "delta": { "x": 0, "y": -67.5, "z": 0 }, "label": "M3 bolts to molded bosses", "source": "internal_electronics_sled", "target": "octahedron_bottom_shell" }, { "delta": { "x": 0, "y": -28.5, "z": 0 }, "label": "Integrated snap-fit", "source": "lora_mcu_mount", "target": "internal_electronics_sled" }, { "delta": { "x": 0, "y": -32.5, "z": 0 }, "label": "M2.5 screws", "source": "relay_module_mount", "target": "internal_electronics_sled" }, { "delta": { "x": 0, "y": -25.5, "z": 0 }, "label": "Threaded into sled brass inserts", "source": "board_mounting_screws", "target": "internal_electronics_sled" }, { "delta": { "x": 0, "y": 0, "z": 0 }, "label": "M3 bolts", "source": "lto_battery_cradle", "target": "internal_electronics_sled" }, { "delta": { "x": 0, "y": 0, "z": 0 }, "label": "Slid into molded guide slots", "source": "patch_antenna_bracket", "target": "octahedron_top_shell" }, { "delta": { "x": 0, "y": 46.5, "z": 0 }, "label": "mount", "source": "octahedron_top_shell", "target": "solar_panel" }, { "delta": { "x": 0, "y": -27.5, "z": 0 }, "label": "mount", "source": "internal_electronics_sled", "target": "base_board" }, { "delta": { "x": 0, "y": 0, "z": 0 }, "label": "mount", "source": "lto_battery_cradle", "target": "lto_battery" }, { "delta": { "x": 0, "y": 0, "z": 0 }, "label": "mount", "source": "patch_antenna_bracket", "target": "internal_antenna" }, { "delta": { "x": 0, "y": 0, "z": 0 }, "label": "mount", "source": "lora_mcu_mount", "target": "lora_mcu" }, { "delta": { "x": 0, "y": 0, "z": 0 }, "label": "mount", "source": "relay_module_mount", "target": "relay_module" }, { "delta": { "x": 0, "y": 0, "z": 0 }, "label": "attached", "source": "silicone_gasket_cord", "target": "mppt_charger" }, { "delta": { "x": 0, "y": -15, "z": 0 }, "label": "M2.5 screws", "source": "bme680_sensor_mount", "target": "internal_electronics_sled" }, { "delta": { "x": 0, "y": 5, "z": 0 }, "label": "M2 screws", "source": "bme680_sensor_mount", "target": "bme680_sensor" } ], "projectId": "75f9c0c8-53db-4789-b086-f53cbd7bcaa8" }