Matrix user forums

Hi This is what I'm expecting to see when you "scope" the pins. Triggering on rising edge of "LED" pin (C0). Trace-1.jpg You can see the one-second flash on the first trace and each time it rises you can see the "blip" on the second trace. In the screenshot you can see two "blips" and I have set up ...

Hi

OK so we can now explain the levels. Easy done and if I've not used my scope for a while I too usually have something not right

Regards

Hi In the screenshots your time base seems to be 200mS per division which means five divisions per second. Looking at your green trace you can see that each high / low change is one second in length suggesting that it is your "led" pin (C0). However I don't understand why the level of a "high" is on...

Hi As we are seeing unexpected things on the traces, we need to move forward a step at a time to establish where things go wrong. If you could redo the tests with nothing but the scope leads connected to the microcontroller as per above that would be a big help. I'm unfamiliar with your scope, but I...

Hi Your microcontroller should have the following connections for these tests (other than power / crystal / programming etc) Pin 2 (D0) = Rx - unconnected Pin 3 (D1) = Tx - connect to ch2 of Scope - nothing else connected to this pin Pin 23 (C0) = connect to ch1 of Scope - nothing else connected to ...

Hi

I'm not familiar with your scope. Are you sure you are set to trigger on ch1 (yellow trace)?

Irrespective of such, your Tx pin trace doesn't look correct.

Can you confirm nothing other than your scope is connected to your Tx (D1) pin?

Regards

Hi I think I see the issue. Lets make the settings / connections as follows Flowcode ESP8266 Settings Tx = D1 Rx = Don't Care / Unconnected Reset Mode = Software ESP SendString macro Text = "U" SendCR = 0 LED Any unused pin you want e.g. C0 Ensure your clock speed matches your crystal. In your chart...

Hi Great, all pins / connections / settings work as expected. Now we will verify component functionality. Change the flash output to a pin not being used by the ESP8266 Tx / Rx (example change to C1) Add in the ESP8266 component and in properties set it for 9600 baud with Tx on D1 (or whatever your ...

Hi Back at a PC. As mentioned that's a good square wave. Next we "prove" the port we will transmit on. Using your flasher chart as above, change the output to be D1 as this is the port that will eventually transmit to the ESP. You should get another nice clean square wave. Once you have that we can ...

Hi I'm not at my PC so can only give brief comment. That looks like a good square wave so we now know that your clock and connections are good. It is always, always worth checking these at the beginning. You cannot over emphasise how valuable this check is. Next, we will prove the port. In your flas...

The LCD doesn't care what speed your controller is running at, it will work regardless of clock speed. Your FC file should be outputting the letter "U" every two seconds as you have two one second delays in the loop, and the letter "U" should have 10-bits in each "burst". Your scope doesn't suggest ...

I just tested the controller and the indicator, everything works according to the program. It seems that you have the hardware or software to see how the esp modules work, and now you are trying to protect or hack them. :shock: It isn't working according to your scope trace and your esp isn't respo...

Hi the "one-second flash test" is probably the best test you can do with microcontrollers and whilst so simple is equally so very great. https://www.matrixtsl.com/wiki/index.php?title=One_second_LED_flasher You can either connect an LED or just use your scope on the pin. If a scope you should see a ...

Hi

Looking at the trace you just shared has me confused if related to the FC file also included.

Have you done a one-second flash check? Just connect your scope to a pin and toggle the pin every second.

Regards

Hi Just remembered you don't have a USB-TTL adapter as such, rather a plug in "piggy back" that takes your esp. With that in mind my previous suggestion of using the adapter to monitor is a non-starter. Disconnect the esp and adapter from your microcontroller and then try the one-second flash test. ...

Hi Sorry I'm confused. Are you saying you still had the ESP8266 adapter board still in-circuit? The one that allows you to connect to a PC? If so that will be the cause of your problems, or very likely to be. The uC should be connecting directly to the Tx / Rx pins of the ESP8266 (possibly reset too...

Hi I'm guessing there won't be. Sounds like it is settings / connections with the uC. Go right back to basics and do a one-second flash test on your uC with no components. Pick any free port and monitor with your scope. You should see a square wave. Add in your LCD and ESP8266 components and initial...

Hi You can use your PC to check. Using your USB-TTL adapter, ensure settings are correct and then connect the USB gadget Rx pin to the uC Tx pin. Run your chart and see what you capture coming out of the uC Tx pin going to the ESP. If nothing then double check connections. If you see an "AT" command...

Hi

First, double check your connections and settings. I assume this is all hardware and not simulation?

Regards

Hi Yep, the "witchcraft" of Flowcode...... Never say "Matrix" three times in front of a mirror at midnight........ :twisted: :twisted: Components when included in your chart take control over certain pins. The ESP8266 component pins (see component properties) connect the microcontroller to the esp82...

Hi

Get rid of the UART component (as per my previous post). There is no need whatsover to include it in your chart at all.

I'd be wary of any simulation.

Regards

Hi Looking at your chart. You are using an ATMEGA and have an LCD, ESP8266 and a UART component added which shares the same connections as the ESP. This is problematic and I'm unsure why you need the UART at all. If you remove this and check other connections/settings you should get some reply. Howe...

Hi I still have little access to hardware or Flowcode, so... I looked at this web page with different examples. Which website? First thing to check is settings, especially connections if you have altered anything from the example you mention. it is not entirely clear when the esp 8266 module sends a...

Hi

Very easy to overlook when a "PC" is taking care of everything as you don't get to see what is going on behind the scenes. Not so with a uC though

Regards

Hi If you reread my answer (# Two) you will see that I inform of what a server expects and what we need to do to achieve this. Only sending part of the required string is very unlikely to achieve results and hitting the enter key before you have sent the entire command will cause the esp to attempt ...