Connecting two sensors to the ExtendedIO on the ESP32-2432So35 board - Can it be done? How?

I have ESP32-2432So35 developer boards (from China), more or less such (from this series):






One has inputs for a humidity/temperature sensor, speaker and ExtendedIO as a "general purpose connector".

The question is whether it is possible, and if so, then how to use this ExtendedIO to connect simultaneously a GPS sensor and an encoder?

I am browsing the web, there is some information about this board, mainly about its touchscreen display. I have the documentation from their Google Drive page, but nowhere stammered how to use the ExtendedIO 🙂

Anybody know something, maybe knows this board (or similar) and is able to help?

The ExtendedIO outputs are 4 pins:

- GND


- IO21

- IO22

- IO35

Here are the docs - https://drive.google.com/drive/folders/1S9Joi...1zA?spm=a2g0o.detail.1000023.1.17102169vREj5d

Directory with 35 at the end in the name. ESP32-2432So35


Will it be possible to connect at the same time GPS and encoder under this board?


Thanks in advance for your help!

Encoder - P3 IO21,IO22,IO35
a GPS - P1 RX

The GPS is the SAM-M8Q (MATEKSYS). It has 4 pins. And P1 is generally for battery power, the chip is supposed to work "in the field" (so somehow I would have to power via micro USB).

P1, pin 1 of which is the power supply and pins 2 and 3 of which are the RS232 serial communication port with a 3.3V voltage standard, just right for MATEKSYS
and one more remark, you cannot use the USB communication and RX/TX of the P1 connector at the same time.

The GPS module is this one: http://www.mateksys.com/?portfolio=sam-m8q I'm specifying just to be sure.


So I just need to take care of the power supply on the microUSB. I'm glad that this will be going soon (I still have to order special plugs for these sockets)...

Thank you very much for your reply!
Added after 1 [minute]:

Zdzicho wrote:

and one more note, you cannot use USB and RX/TX communication of the P1 connector at the same time

OK, I understand. This will not be needed. As I wrote above the USB will be used to power the 1S 3.7V Li-Pol battery.

One more question: those white sockets on the board are JST SH1.0-4P ? I wouldn't ask this, but I already bought the cables, they came and .... they turned out to be too small. He wants to make sure now! I am asking about the white ExtendedIO and Power Supply sockets.

They say 4P-1.25, so they are sockets with a pin spacing of 1.25 mm, not 1 mm. Such plugs are easily purchasable.

CC_PL wrote:

These white sockets on the board are JST SH1.0-4P ?

Definitely, no.

I know they are available to buy, but what are they called? The raster is 1.25mm, 4-pin, but what is their professional name?, as there are dozens of types in the shops and several are quite similar. Probably these are the ones: JST XH 1.25mm 4pin (??)

You would need to include clear photos of these sockets from the front and top. The documentation you provided links to doesn't say a word about this.

It looks something like this but ...
https://www.tme.eu/html/PL/zlacza-df14-raster-1-25mm-hirose/ramka_25921_PL_pelny.html

Thank you Zdzicho

I bought the JST XH 1.25mm 4pin, it arrived today and is OK - finally!

Zdzicho wrote:

P1 whose pin 1 is the power supply while pins 2 and 3 are the RS232 serial communication port with 3.3V voltage standard just right for MATEKSYS and one more remark, it is not possible to use simultaneous communication over USB and RX/TX of P1 connector

I don't know which numbers, pin designations to use in the application for TX and RX. I connected the GPS to the board and it doesn't detect it - error "check wiring".

I use the TinyGPSPlus library: https://github.com/mikalhart/TinyGPSPlus

What about simultaneous RX/TX communication in P1 and USB, I understand that I won't be able to view the result on the Monitor (Serial Monitor in Arduino IDE)?

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Here are the docs: http://pan.jczn1688.com/directlink/1/ESP32%20...d21CmARCmARXj&file=3.5inch_ESP32-3248S035.zip

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Added after 1 [hour] 16 [minutes]:

Here's some info: https://dzen.ru/a/ZBs49e6DKmsHHVQk

I schematy:

Personally, I would knock out that led1 tricolour and use two of the three ports to communicate with the GPS

Zdzicho, I would not want to interfere so much with the board

In post #4:

Quote:

P1 of which pin 1 is the power supply while pins 2 and 3 are the RS232 serial communication port with a 3.3V voltage standard just right for MATEKSYS and one more note, it is not possible to use simultaneously USB communication and RX/TX of P1 connector

you have recommended P1 connector and I would like to use it . Only I don't know what pin numbers are assigned to the outputs in P1.

U0-RXD - 35 and U0-TXD - 34?? .

Standard, i.e. RxD - GPIO 03 and TxD - GPIO 01

Rather, I would use the P3 socket and assign GPIO 21/22 in the program to UART1 for communication with the GPS so as not to block myself with Serial Monitor on UART0.

The socket named ExtendedIO will be used for another sensor. It is already occupied.