@sam_uk
I also looked at these Olimex boards but did not like the selection or available GPIO’s and the price
And i wanted to try out different options to the already documented DIY Meshtastic devices
You must still add
I2C Oled
SPI LoRa Module
and
optional Serial GPS module
instead I used these other options for a prototype DIY Meshtastic device
GPS (9600 baud Serial)
U-BLOX SAM-M8Q
LoRa 433Mhz Transceiver Module (SPI)
RA-01
LoRa 868Mhz Transceiver Module (SPI)
RFM95W LoRa Module
ESP32 Dev Board with ESP32-WROOM-32 4M
New version
ESP32 Test Board Burner Development Board WIFI Module For For ESP-WROOM-32
And Tiny board
M5Stack STAMP PICO DIY Kit ESP32-PICO-D4 ESP32
Next i want to look at using a NRF52840 and SPI Screen and LoRa (SPI)