Frequency tie in m00 and ESP 32 Lora 32

I have a heltec Lora two channel gateway ( m00) and two of the Lora esp 32 v2 heltec units. I am trying to get the esp32s to transmit to the gateway., but I seem to be missing something in the setup as after setting up the esps with the sender code ( setting band to 915E6), and setting the gateway channels to 915, I still don’t see the senders data on the gateway. Do you have to set more than the band on the esp32 Lora senders?


could you try this code for WiFi LoRa 32?