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

biospank commented 3 months ago

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 commented 2 months ago

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 commented 1 week ago

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 commented 5 days ago

If your other device is not SX1262, please refer to https://github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series/issues/173

TorbenNor commented 4 days ago

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 https://github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series/issues/173

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SX1262 (433MHz) and SX1278 (433MHz) LoRa chips #249