<![CDATA[Still need help for 3 basic stuff : matter of pin : digital/analog output/input ?]]>I really like M5Stack ; i use UIFlow. With demos about some sensors i managed to make a few things.
Some bugs with previous version have disapeared with 1.6 and 1.7, and that s really nice.

But i still need help :
can someone tell me how to :

  • make a 3 colored traffic light with 3 LEDs as we find each time for arduino ? What pins can i use for a DIGITAL OUTPUT and how can i set them HIGH or LOW?
  • what pin can i use for de ANALOG OUTPUT and make for example a voltage ramp or a sinus signal ?
  • make a connexion with a pH-meter or a conductivity-meter or any science measurement apparatus with a 0-5V output ? what pins can i use for a ANALOG INPUT ?

if someone can help me for those basic stuff ? Thanks a lot.

]]>https://community.m5stack.com/topic/3323/still-need-help-for-3-basic-stuff-matter-of-pin-digital-analog-output-inputRSS for NodeMon, 09 Mar 2026 23:54:08 GMTFri, 28 May 2021 19:54:47 GMT60<![CDATA[Reply to Still need help for 3 basic stuff : matter of pin : digital/analog output/input ? on Mon, 31 May 2021 07:51:23 GMT]]>@robalstona thanks for sharing my book.
@Serge hi, sorry been busy.
I/O pins are 3v3 tolerant not 5V tolerant and no need additional components to protect them.
The book was mainly based around UIFlow and M5Stack specific hardware but will have a look.

]]>https://community.m5stack.com/post/13958https://community.m5stack.com/post/13958Mon, 31 May 2021 07:51:23 GMT<![CDATA[Reply to Still need help for 3 basic stuff : matter of pin : digital/analog output/input ? on Sun, 30 May 2021 18:51:03 GMT]]>Yes. Maybe that kind of sheet already exists somewhere ? M5-Core-Schematic(20171206).pdf
GPIO 37 38 39 are for buttons A, B C. for example ?

I guess aviable GPIOs are only those with male or female connexions as shown on picture above so they re the only one we can really use.

]]>https://community.m5stack.com/post/13950https://community.m5stack.com/post/13950Sun, 30 May 2021 18:51:03 GMT<![CDATA[Reply to Still need help for 3 basic stuff : matter of pin : digital/analog output/input ? on Sat, 29 May 2021 13:25:53 GMT]]>You must also find what other deviced are builtin (like gyroscope, microphone, buttons leds) and what gpio pins they used.

]]>https://community.m5stack.com/post/13944https://community.m5stack.com/post/13944Sat, 29 May 2021 13:25:53 GMT<![CDATA[Reply to Still need help for 3 basic stuff : matter of pin : digital/analog output/input ? on Sat, 29 May 2021 10:58:25 GMT]]>Hi, thanks, there s a lot a reading there.
I ve just understand the association on the picture below. Maybe it is too obvious or i am a ?**!@&0_1622285897944_m5_rear_no_s2.png

]]>https://community.m5stack.com/post/13943https://community.m5stack.com/post/13943Sat, 29 May 2021 10:58:25 GMT<![CDATA[Reply to Still need help for 3 basic stuff : matter of pin : digital/analog output/input ? on Sat, 29 May 2021 09:53:28 GMT]]>Link to Uiflow handbook. You must find file quickblockref.pdf

https://github.com/Ajb2k3/UIFlowHandbook

On this site you have information which pins you can use as input/output adc input/dac output
https://randomnerdtutorials.com/esp32-pinout-reference-gpios/

]]>https://community.m5stack.com/post/13942https://community.m5stack.com/post/13942Sat, 29 May 2021 09:53:28 GMT