PCB arrived today.
Initial Setup
Soldered JP1,2,3 (debug LED, power , and charge indicator)
Set to ESP32 DevKit
Blink is working and printing to serial console on programmer UART
Initial TODO
- Hello World!
- Evaluate charger circuit
- Add compiler directive for non-Heltec software build
- ADC review for VBAT
- ADC review for VSOLAR
- Digital CHGST pin read
- Rain gauge interrupt routine back online
- I2C evaluation with BME280
- Weather direction evaluation
- Wind speed evaluation
- New LoRa radio install for 915MHz
- Calibrate ADC for VBAT
- Calibrate ADC for VSOLAR
- Verify I2C power switch
- Verify LoRa power switch
Evaluation Notes
Charger Circuit
LED is on when charging
Mounting alternate pinout LoRa radio
I’ll be using Caption tape to insulate the pads from the module electrical points. The good news is that the GND pads and antenna match, so those will be soldered directly.
I2C operating with BME280
Had to add intentional delay for wind speed data collection as there is no WiFi connect negotiations to rely on.
Getting my LoRa radio to connect to the PCB will be a total hack job. Bringing it to work tomorrow to use the precision soldering iron.
Prepped LoRa radio for modifications. I’m using high temperature Kapton tape to insulate pads that I’m intending on soldering jumper wires to.
