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.

[TorbenNor]

I just got a t-watch s3 where I use the same radio lib on several 433mhz boards.
The lib are the T-Watch-Deps
But t-watch s3 are unable to sent or recive any , same in demo installed on the shiped version

[lewisxhe]

If your other device is not SX1262, please refer to Xinyuan-LilyGO/LilyGo-LoRa-Series#173

[TorbenNor]

Hi Lewis If I change the SF value to 7, it works radio.begin(433.0, 125.0, 7, 5, 0x12, 17); And device with both radio lib and LoRa lib works now, thanks Might be the demo code should be changed to this value as this will solve the issue for other users also 😊 /Torben Nørskov Fra: Lewis He ***@***.***> Sendt: 24. november 2024 03:16 Til: Xinyuan-LilyGO/TTGO_TWatch_Library ***@***.***> Cc: TorbenNor ***@***.***>; Comment ***@***.***> Emne: Re: [Xinyuan-LilyGO/TTGO_TWatch_Library] SX1262 (433MHz) and SX1278 (433MHz) LoRa chips (Issue #249) If your other device is not SX1262, please refer to Xinyuan-LilyGO/LilyGo-LoRa-Series#173 <Xinyuan-LilyGO/LilyGo-LoRa-Series#173> — Reply to this email directly, view it on GitHub <#249 (comment)> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKYOIQITHUQDPNU2ATEJPFD2CEZGBAVCNFSM6AAAAABMEQRD3KVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDIOJVG42TOMBUGQ> . You are receiving this because you commented. <https://github.com/notifications/beacon/AKYOIQP6GWODYKUOFRNPCVL2CEZGBA5CNFSM6AAAAABMEQRD3KWGG33NNVSW45C7OR4XAZNMJFZXG5LFINXW23LFNZ2KUY3PNVWWK3TUL5UWJTUUYI5PI.gif> Message ID: ***@***.*** ***@***.***> >