ESP32 LoLin32 Lora Shield for RFM95 or RN2483
- I2C Pullups placement
- Classic I2C connector with SCL/SDA and 3V3/GND reversable pin by solder pad
- Groove I2C connector
- Footprint for RFM95/96/98 or RN2483/RN2903 Lora module
- Footprint for choosing single Wire, SMA or u-FL Antenna type
- 1 x WS2812B Type LED for visual indication
- 1 x Push Button
- Added footprint for Microchip 24AA02E64 64 bits serial number (DEVEUI)
Take care that WeMos changed Lolin32 format, you need to choose V1.0.0 that you can find on ebay, banggood or aliexpress.
Wemos does net seem to produce this board anymore. They're Back here. They do now Provide WeMos Lolin32 Pro or Lolin32 Lite
So be sure to order board in the center of the picture above
You can also check the shield for the Lolin32 Lite version.
Look at the schematics for more informations.
SPI connexion is classic (MOSI/MISO/CLK),
Other pins that may need be adapted into code (for example if you use TTN network gateway code) according to the following pinout
Lolin32 RFM9x Module IO5 <----> SEL IO19 <----> MISO IO23 <----> MOSI IO18 <----> CLK IO27 <----> DIO0 IO26 <----> DIO1 IO4 <----> DIO2 IO25 <----> RST IO35 <----> DIO5 Lolin32 RN2xx3 Module IO4 <----> RESET IO25 <----> RX IO35 <----> TX Lolin32 Shield Feature IO22 <----> I2C SCL IO21 <----> I2C SDA IO13 <----> WS2812 LEDS IO15 <----> Push Button
Do not forget to join (solder) the correct LoRa antenna trace depending on module you place (RFM95 or RN2483), see picture below.
And as classic advice, connect the LoRa antenna before powering the board to avoid any damage to LoRa module
There is no firmware available, but you can have a large demo of features and a full working LoRa node (with RFM95) with this excellent ESP32-Paxcounter software, it's a must see.
You can order the PCB of this board at PCBs.io. PCBs.io give me some reward when you order my designed boards from their site. This is pretty good, because I can use these rewards to create and design new boards and order them for free, so if you don't care about PCB manufacturer please use PCBs.io.
Assembled boards (V1.0)
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
If you want to do commercial stuff with this project, please contact CH2i company so we can organize an simple agreement.
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