Class C - ESP32 + LORA 868 + 0.96 OLED

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The board you linked is a Heltec Wifi LoRa 32 (V2).
According to the images it is a V2 board (did not notice V2 in the text while briefly scanning).
Pretty expensive there, better have a look at Heltec Automation store on AliExpress.

In case you want to use a Heltec board because of their (advertised) Class C support:

If you explicitly need the WiFi/BT support (or processing power) of the ESP32 the best choice is probably:

  • Heltec Wifi LoRa 32 V2 (get the V2 not the older V1), or
  • Heltec Wireless Stick (has smaller, lower res display but possibly better WiFi antenna).

If battery operation is required (not for class C of course) then:

  • Heltec Wireless Stick Lite, or
  • Heltec Wireless Shell

If you don’t need WiFi/BT then the following may be a more interesting/better choice:

One of the Heltec CubeCell boards.
The CubeCell product range is based on ASR650x SiP (which integrates ARM Cortex M0+ with SX1262), has Arduino support and its LoRaWAN support is based on Semtech’s LoRaMAC-node.

Some nice CubeCell dev boards are:

  • Heltect CubeCell Dev-Board Plus (HTCC-AB02)
  • Heltec CubeCell GPS-6502 (HTCC-AB02S) similar to above but with onboard GPS
  • Heltec CubeCell Dev-Board (HTCC-AB01) this board is the smallest, has fewer IO ports and no SPI available though (based on ASR6501 while above AB02x boards are ASR6502 based).

Be aware that both Heltec’s ESP32 LoRaWAN library and their CubeCell product range support LoRaWAN Class A and Class C only (support for class B is not specified).

FYI: Of the above boards I have personal experience with the Wifi Lora 32 (V2) and CubeCell Dev-Board only and no experience with Heltec’s ESP32 LoRaWAN library or Class C.

Useful links