At last, some coherent results

A project log for LoRa darkStar

Low Quiescent Current, Solar Powered +30dB LoRa

capt-flatus-oflahertyCapt. Flatus O'Flaherty ☠ 02/08/2023 at 15:230 Comments
It's been moderately sunny here, so the battery got a nice boost of charge up to 4.2 volts and did not over reach the MCU pin like before. Success! Not exactly sure why it was so difficult, but believe it's something to do with internal resistors in the ESP D4 chip . Testing this device is made more difficult by the TPL5110 timer chip which tends to throw a wobbly when parts of the circuit are changed. For example, it takes a full 3 hours of being left unconnected to the battery or any other power source, before the chip becomes resetable. Could be an internal capacitor holding onto the programmed time value and refusing to let go!

Live results can be seen here: ..... but dont forget to turn off the browser cache or it wont refresh.