Ebyte E78-868LN22S

Hi there,

i got some Ebyte E78-868LN22S SW Version 4.0, the datasheet seems to be older than the firmware…
I tried to set it up in a german lorawan so 868MHz, in both methods OTAA / ABP. Nothing to see in my console for the device nor the gateway. the module doesn’t even draw more current when I await it to connect to gateway. I’ver the break out board USB version as well as the single chip with DIY breakout, same behviour.

So may question is, anybody had a successfull join and datatransfer with those modules?
In addition i’ve a CDEBYTE E78-DTU(900LN22) which is working just fine.

Any suggestions anyone? Looking forward for some support, thanks in advance!!

BR Jochen

HI jochenstromberg !

About two years ago I was successful with some E78 868LN22S modules in OTAA and ABP modes
I live in France (868MHz) , my TTIG gateway is in the attic
Modules came from EBYTE/CDEBYTE chop on Aliexpress
No firmware changed for the inside ASR6501 chip

As I look to log notes I see that :

Device used LoRaWAN version 1.0.2, Regional Parameters 1.0.2 rev B
AT+CGMM? reported E78-900M22S (but E7868LN22S seen on module’s metal lid)
AT+CGMR? reported SF V1.0

Alain

Thanks to Alain,

That ist exact what i saw…

I have the USB breakouts with Firmware 4.0 which does Not Work. I got two stamps / barr Chips with FW 3.0 those Work. Furthermore i tested a DTU 78 steal cased device, using also an E78 868 ln 22s with a Special DTU Firmware in Alpha state, working properly also.

For gateway i am using a sensecap.

I requested some Firmware Infos at Ebyte, WE will See how their Support will react…

I am located in middle Germany near Frankfurt

so some more details:
not working version is:
TX:AT+CGMM?
RX:+CGMM=E78-868LN22S
OK

TX:AT+CGMR?
RX: +CGMR=v4.0
OK

Working one in “steel metal case” E78-DTU:
Lora 1.0.2/ 1.2.0.b
TX:AT+CGMM?
RX:+CGMM=E78-DTU
OK

TX:AT+CGMR?
RX:+CGMR=1.0.1-20221202_Alpha
OK

working one as “stamp / bare chip”:
Lora 1.0.1 1.0.1
TX:AT+CGMM?
RX:+CGMM=E78-868LN22S
OK

TX:AT+CGMR?
RX:+CGMR=v3.0
OK

Please format the log output with the </> - it makes it much easier to read.

As you’re able to get the serial output, perhaps consider showing us what actually happens which is the heart of the matter - show us the serial output of a join attempt.