matthias-bs / lorawan_node Goto Github PK

The footprint for the fuse F1 is too narrow.
As a workaround, F1 can be placed instead of connector J6 and a pin header at the actual F1 pads can be used to connect the fuse in series to the battery B+ wire. (see photo)

Connection from battery B+ to analog input voltage divider is missing.

Workaround: Add a wire from B+ to J5.7 (A3) (see photo - white wire)

Add TVS diodes for enhanced ESD protection of inputs connected to external sensors (with long wires), e.g. OneWire or UART.

A0 can be connected to VB on the FireBeetle ESP32 board (if R10 and R11 are assembled), but it is also connected to the external input J5.1 via a voltage divider.
To be able to use both ADC input sources independently, the analog inputs of the LoRaWAN_Node PCB should be changed from A0...3 to A1...4.

Add sensor power switch circuit, e.g. for multiple A02YYUW / DFRobot SEN0311 Ultrasonic Distance Sensors.

See photo