Cytron Technical Forum

Posted: **Wed Apr 10, 2019 2:16 am**

Hi

I bought two unit of Cytron ESP8266 Wifi shield.
When I try out the sample code, one of the shield give me the error of "Error talking to shield", regardless which sample apps I try.
But, on the second shield, all the code work perfectly! I wonder what's wrong with the shield with the "Error talking to shield"

This is the firmware for the working shield, I believe the non-working should be the same version, coz I bought it together.

CODE: SELECT_ALL_CODE: AT version:0.52.0.0(Jan 7 2016 18:44:24) SDK version:1.5.1(e67da894) compile time:Jan 7 2016 19:03:11 Mode: 1 Start wifi connection Connected to D1106 IP address: 192.168.1.157 2

Shaw

Posted: **Wed Apr 10, 2019 6:56 am**

Mind showing the setup of the shield that is not working? A clear photo from top is good enough.

Posted: **Wed Apr 10, 2019 9:01 am**

on the left, is working, on the right is not.

Shaw

Posted: **Wed Apr 10, 2019 10:09 am**

Hi, thanks for the picture... mind sharing the sample code that you use here?

Posted: **Wed Apr 10, 2019 2:07 pm**

It is just to run the sample code from your GitHub, just modified the SSID and key to match my network.

nothing change.

Shaw

Posted: **Wed Apr 10, 2019 3:37 pm**

Actually there are quite a number of sample code in our github... Anyway, I will assume you use CytronWiFiDemo.ino....

I also notice there are differences between both your WiFi shield, the mini jumper on the UART pin selector. RX and TX. The sample code is based on pin 2 and 3.

The shield that is working has both these mini jumper at D2 and D3, while the one which is not working is at D0 and D1. Try change those mini jumper to D2 and D3.

Posted: **Wed Apr 10, 2019 4:39 pm**

Yes, I do tested on the WIFIDEMO, HTTPS, etc. But the result are the same.

Both shield doesn't work for the https.
One of the shield doesn't work for the WIFIDEMO, it gave the "Error talking to shield".

Both card jumper is set to using
TX --> D3
RX --> D2

exactly the way I received it.

Posted: **Wed Apr 10, 2019 9:59 pm**

Should I install the new firmware to test?

Shaw

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