T-Display-S3 with E220

[Giuseppe]

Hello, I am trying to connect a T-Display-S3 to a Lora Ebyte E220. It doesn’t matter if I connect it to the serial port (pins 17 and 18); I tried with Hardware Serial, but it didn’t work either. I have tested several pins, but I can’t get it to work with the LilyGo T-Display S3. I have managed to make it work perfectly with two other ESP32 references, but I cannot do it with this one (I am very new to electronics). Any help would be greatly appreciated. Here is the link to the ESP32 board I am using, and the code I am trying to apply is the example that comes with the library. Board: https://www.lilygo.cc/products/t-display-s3

[Andrecolz]

hello did you manage to solve the problem? i think i am in the same situation as you.

[Renzo Mischianti]

Hi all,
paste the controller you use to mange It.
Bye Renzo

[Andrecolz]

hello forgive me but I’m fairly new to this world of lora/esp32 so I’m not familiar with it, what is a controller?
do you mean the obj lora constructor?
if so this is mine: LoRa_E220 e220ttl(18, 17, &Serial2, 21, 43, 44, UART_BPS_RATE_9600);
but on second thought mine might be a different problem to Giuseppe’s, but I’m not sure, I should also try testing it on other boards like arduino, but my main interest was to develop for t-display-s3.
thanks for the help.
Andrecolz

[Renzo Mischianti]

Hi,
I think It’s Serial1 not Serial2.
And there isn’t necessary specify the pin of the serial.
Bye Renzo

[Andrecolz]

hi, i just tried changing my constructor as you suggested: LoRa_E220 e220ttl(&Serial1, 21, 43, 44, UART_BPS_RATE_9600);
but e220ttl.available() always stays on 0, could it be a problem done during configuration?

[Renzo Mischianti]

Hi,
use get configuration sketch and enable the debug.
After that post the output.
Bye Renzo

[Andrecolz]

hi, i did as you said, this is the output:

No response from device! (Check wiring)
12
----------------------------------------
HEAD : FA 1 DD
 
AddH : 60
AddL : 36
 
Chan : 8 -> 418MHz
 
SpeedParityBit     : 1 -> 8O1
SpeedUARTDatte     : 1 -> 2400bps
SpeedAirDataRate   : 1 -> 2.4kbps
 
OptionSubPacketSett: 11 -> 32bytes
OptionTranPower    : 11 -> 10dBm
OptionRSSIAmbientNo: 0 -> Disabled (default)
 
TransModeWORPeriod : 0 -> 500ms
TransModeEnableLBT : 1 -> Enabled
TransModeEnableRSSI: 1 -> Enabled
TransModeFixedTrans: 0 -> Transparent transmission (default)
----------------------------------------
No response from device! (Check wiring)
12
----------------------------------------
HEAD: 54 72 97
Model no.: 6E
Version  : 73
Features : 70
----------------------------------------

[Renzo Mischianti]

Please add also the pin initialization part.
Bye RM

[Andrecolz]

hi, LoRa_E220 e220ttl(&Serial1, 21, 43, 44, UART_BPS_RATE_9600);
is it necessary to use pinMode(pin, INPUT_PULLUP);?

[Renzo Mischianti]

No no,
I need the first part of Serial output where the pin initialized are printed.
Bye RM

[Andrecolz]

this?

ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x15 (USB_UART_CHIP_RESET),boot:0x8 (SPI_FAST_FLASH_BOOT)
Saved PC:0x4202af9a
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce3808,len:0x44c
load:0x403c9700,len:0xbe4
load:0x403cc700,len:0x2a38
entry 0x403c98d4

i have only it in serial output

if you please, I tried to redo the setconfiguration, this is my code: https://codeshare.io/Odg6oW
but unfortunately I get this:

No response from device! (Check wiring)
12
Save mode returned not recognised!
11
No response from device! (Check wiring)
12

and if I use Serial2 the board’s usb port is not recognised.

[Andrecolz]

I realised that after entry 0x403c98d4 there were also these codes:

E (14) gpio: gpio_set_level(226): GPIO output gpio_num error
E (14) gpio: gpio_set_level(226): GPIO output gpio_num error

[Renzo Mischianti]

Hi,
It seems that the pinout Is wrong; put the device on a breadboard and, with an LED, test the single pin output.
Give me feedback RM

[Andrecolz]

hello, sorry but I’ve been busy these days, I tried doing as you said, the leds came on on all gpio except 21 (AUX) but using pinMode(21, OUTPUT); the led comes on.
however i noticed one thing all the leds light up low, but using pinMode(nGPIO, OUTPUT); the leds light up more, so i think there is some problem in the management of the gpio and you have to set the various pinMode()? in that case M0 and M1 would be in OUTPUT but AUX, RX and TX?

[Renzo Mischianti]

Hi Andrecolz,
probably some internal management, try to remove/change all pull-up resistors and try to use other pins.
Bye Renzo

[Author]

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