Using SDL_Arduino_TCA945_Test example code

SDL: Please let me know if you think I have a bad board. I am running the test SW for this board which, as above, cannot find any I2C addresses. The error code returned is "2". I used another I2C scan program I found on Instructables. Works fine. Sees the I2C devices INCLUDING the MUX board at 0x73. However, the scanner finds nothing connected to the MUX board - no matter which Grove connector is used. JP1 Grove is connected to OurWeather ESP8266 Grove. an LED display board is connected to one of the I2C bus connectors on the MUX board. There is power to all the GRove connectors. If I move the LED display off the MUX onto the OurWeather board, the I2C scanner program picks it up - 0x3C. I cannot find anything in the documentation on hooking up the MUX board other than simply plugging in the Grove connectors. I even tried JP8 connected to a VCC and the LEDs on the board stayed dark. I added code to the I2C scanner program from what I saw in the MUX test script:

#include <SDL_Arduino_TCA9545.h> // I2C MUX
SDL_Arduino_TCA9545 TCA9545;

oid setup() {
Serial.begin(115200);
TCA9545.TCA9545SetConfig();
TCA9545.write_control_register(TCA9545_CONFIG_BUS0);
TCA9545.write_control_register(TCA9545_CONFIG_BUS1);
TCA9545.write_control_register(TCA9545_CONFIG_BUS2);
TCA9545.write_control_register(TCA9545_CONFIG_BUS3);

What am I doing wrong OR do I have a bad board.
Thanks for your help

Here is a pic of the board wired up to OurWeather ESP8266
The 4-channel MUX has a Grove wire attached to JP1 on the Mux which goes to an I2C Grove connector on the digital extension board
which is connected to OurWeather via a Grove to PIN wire.

Connected to the 4-channel MUX is my A/D board with the air quality sensor attached to it
the A/D board is JP2

Running SDL_Arduino_TCA9545_Test script against this setup produces the following output:

SDA_Arduino_TCA9545_Test
Reading all four I2C Buses
------------------------------
------------------------------

------------------------------
------------------------------
Bus 0 Control Register:F
Scanning...
No I2C devices found

------------------------------
Bus 1 Control Register:F
Scanning...
No I2C devices found

------------------------------
Bus 2 Control Register:F
Scanning...
No I2C devices found

------------------------------
Bus 3 Control Register:F
Scanning...
No I2C devices found


If I totally disconnect the 4-channel mux and run the script I get the same results.


The following is the code I added to V35 of OurWeather:
I have the A/D & air quality sensor connected to the 4-channel mux -
You can see from the picture the air quality sensor is not found (NP)
If I connect the A/D & air quality sensor directly to an I2C grove connector on the digital extention board,
the sensor is picked up just fine

#include <SDL_Arduino_TCA9545.h> // DD V1.2 drivers for 4-channel MUX
SDL_Arduino_TCA9545 TCA9545;

void setup() {
Serial.begin(115200);
Wire.begin();
TCA9545.TCA9545SetConfig();
Serial.println("SDA_Arduino_TCA9545 setup...");

I apologize but I could not see a way to upload a picture for you so I emailed it to:
[email protected]
Subject: Using SDL_Arduino_TCA945_Test example code

73 is the TCA9545 board. You are seeing it!

Thanks for the picture, it was helpful. Looks like you have wired it appropriately.. Would you try one more thing? It could be you have too many pull-ups on the I2C bus. Plug the I2C Mux directly into the WeatherPlus board and re-run the test with only the i2C Mux on the external bus.

BP

Sounds like you have a bad one. Here is an RMA #. Send it to: (include your shipping address)

SwitchDoc Labs
RMA# 030119-01
909 S Shelley Lake Lane
Spokane Valley, WA 99037

BP



I think you are using the wrong SDA and SCL and the tis why you aren't seeing the I2C max. It is unlikely there is a problem, but my revelation may have come too late.

This is the key.


Scanning (SDA : SCL) - GPIO5 : GPIO4 - I2C device found at address 0x21 !
I2C device found at address 0x3C !
I2C device found at address 0x49 !
I2C device found at address 0x57 !
I2C device found at address 0x60 !
I2C device found at address 0x68 !
I2C device found at address 0x73 !
I2C device found at address 0x77 !

Read more: http://forum.switchdoc.com/thread/830/using-arduino-tca945-test-example#ixzz5h9CgjBER
You saw the device here and you should see it in your TCA scan  It always sees itself too at 0x73.

BP

Well, as soon as it gets here (and it should be here now - I'm out of the office until Monday), I'll test it and probably send you the same board back. Looks like a software problem.

BP

FYI: I had not heard anything until I sent an email to SDL Cust Service email asking for the status of this RMA: Application Support (Customer Service) <[email protected]>

Tony Jarosz asked me to send the board to him in Phoenix. However, you had told me to send it to WA which I did. I gave Tony the shipment and tracking number info and am waiting for a reply.

Guys: This is really holding up my project. I need to have the board to resolve conflicts between the SunAirPlus and the OurWeather onboard BMP280. It is now the 13th and my return board was delivered to Veradale, WA on the 4th.

Appreciate your help in getting this resolved.....