E32-900T20D communication

[rudy]

How to configure Ebyte E32-900T20D modules? Ebyte tool “RF Setting E32 TTL v3.49” does not work (“Module not supported” message)….

I tried also LittleFS, following the instructions on http://mischianti.org/ebyte-lora-e32-web-manager-description-configure-and-demo-esp8266-esp32-2/ but when I refresh the configuration website, I get different configuration and moduleinfo data every time. Also a message “The information on the module is inconsistent, reset the device.”

I can easily establish communication between E32-868T20D modules.

Is there a difference in approach between E32-868T20D and E32-900T20D modules?

Best regards,

Rudy

[Renzo Mischianti]

Hi Rudy,
It’s very strange, but if Ebyte tool had problems I think the module was broken, try to do simple set configuration and get configuration (specify correct define for frequencies), and activate DEBUG on library.
Bye Renzo

[rudy]

Hi Renzo,

Thank you very much for caring about my problem 😉

In the meantime I got an answer from ebyte with a link to RF_Setting3.9 for E32-900T20D (https://www.ebyte.com/pdf-down.aspx?id=2548) and this tool works great!

I’ll experiment further with this and let you know my experiences.

Best regards,

Rudy

[rudy]

Hi, communication with E32-900T20D is now successful, but only with fixed communication. I enabled DEBUG in ” LoRa_E32.h.” and sometimes I get a “timeout error” error. This occurs when aux stays low for more than 3000 msec… An arduino reset does not solve anything. I need to completely remove the power supply, so I’m assuming the E32 module is crashing. I therefore have tried an “e32ttl.resetModule();” but without success… I also tried “this–>serialDef.stream–>setTimeout(1000);” in “LoRa_E32.cpp” (line 264) with values from 100 to 3000, also without result…

Another observation: when a message is sent, it arrives nicely at the recipient. However, when sending a second message, the recipient reports the first sent message followed by the second sent message. Apparently the buffer is not being cleared from the receiver or the sender. I tried a “flush();” and a “cleanUARTBuffer(); (with “private:” commented out in LoRa_E32.h line 237) but also to no avail…

Any idea?

Best regards,

Rudy

[Renzo Mischianti]

Hi Rudy,
It’s very strange, try to put 5v power supply and change pull-up resistor with lower value.

When you read the buffer It’s cleared, but if you send fast series of messages you must use readMessageUntil (orange box)

        ResponseContainer receiveMessageUntil(char delimiter = '\0');

You must send a message with a terminator character

ResponseStatus rs = e32ttl.sendMessage("Prova\0");

and receive message like so

ResponseContainer rs = e32ttl.receiveMessageUntil();

default terminator as you can see in the declaration of the method is ‘\0’, but you can use what you want.

Bye Renzo

[rudy]

Fantastic! Problems solved. Problems did indeed occur with fast series of messages. You made my day! Thanks a million!

Best regards,

Rudy

[Renzo Mischianti]

Hehe.. no problem Rudy
Bye Renzo

[Author]

Posts