SX1262 (433MHz) and SX1278 (433MHz) LoRa chips

[biospank]

Hi, I'm experimenting with the the following modules: t-watch s3 (433MHz) LoRa32 V2.1_1.6 (Disaster-radio 433MHz)

Using t-watch s3 as LoRa receiver and LoRa32 V2.1_1.6 as transmitter

Setting the same parameters for

• carrier frequency
• bandwidth
• spreading factor
• coding rate
• sync word

On t-watch s3 side I use RadioLib library On LoRa32 V2.1_1.6 I use arduino-LoRa library

If I use the same module as transmitter/receiver (ex LoRa32 V2.1_1.6 on both sides) they communicate fine.

While if I use t-watch s3 as receiver and LoRa32 V2.1_1.6 as transmitter they cannot.

My question is:

• Are these modules (that come with different LoRa chip SX1262/SX1278) compatible?
• If yes, please can you point me to the right direction?
• If not, which LoRa module from Lilygo can I use to communicate with t-watch s3?

Any help/advice would be appreciated

[KonRoz]

I ran into this problem 6-10 months ago. If I remember correctly, the solution had to do with setting the preamble length to correspond and enabling CRC on both.