The SN1 Solar Node is not your average development board. It provides a IP65 enclosure, lid with a 0.8W solar panel, 18650 battery protection and solar charger, ultra-low power 3.3V switching regulator, an ESP32-C3 with USB-C jack, battery monitoring circuit, power switch (still allows charging when off), and an onboard temperature sensor to get you started. Almost all I/Os are brought out to 0.1″ pin header holes and a small prototyping strip-board (0.1″ spacing) is also provided.
Depending on your needs, the device may be used with either a single or dual 18560 lithium-ion cells. For single-cell only applications, extra prototyping space is available for your custom circuit.
Example ESPHome firmware comes pre-installed and source files are available on our github page.
Specifications
- Controller: ESP32-C3
- System voltage: 3.3 V
- Integrated solar panel: 5 V, 160 mA (0.8 W) in full sun
- Switched off discharge current: 3.2 uA
- Switched on:
- WiFi access point mode discharge current: 85-100 mA
- WiFi connected mode discharge current: 20-50 mA
- Deep sleep discharge current (measured at battery): 40 uA
- Max available supply current (for user-added additional components): 200 mA
- Operating temperature: -20° to +85° C
- Dimensions:
- Including mounting tabs: 150*85*35 mm
- Not including mounting tabs: 115*85*35 mm
- Enclosure rating: IP65
- Hardware included: Stainless steel screws, foam gasket
Resources
Note: 18650 batteries are not included.
Heather –
I am a flower farmer and used this device to monitor the temperature in a bed of tulips that I had under row covers this past spring. The bed is about 150 feet away from my house and I had no problem getting accurate readings which helped me to know when they needed to be uncovered (so they wouldn’t fry on hot sunny spring days) and re-covered (to hold heat in at night and on cooler days so they would bloom sooner). Having the temp data available saved me from destroying my crop on a number of occasions. So glad I had it. The battery never dipped below 95% and it worked flawlessly all spring.