Not quite correct, it is the computer that is needed to transfer the data and send the commands to mycobot.

I'm very sorry about that. This forum does not allow GIFs. Watch it on hackster if you're interested in watching it!

@pengyuyan The m5stack-basic esp32 is mainly used for the Internet of Things. The robotic arm needs a bridge to connect to the computer, where the m5stack-basic esp32 development board is used, which also powers the arm. We have set up some microPython in the m5 to facilitate using some functions.

For my Celestron Nextstar SE I simply added a cheap Bluetooth module into the Hand held controller. There are many different versions of the controller board so there are many different instructions available. One is here: https://www.instructables.com/Bluetooth-enabled-Nexstar-handcontroller/ In my device it was a version where no instructions were availlable but it was easy to identify the RX and TX line between the USB chip and the microcontroller (which is the bigest chip inside). It was also easy to find a line that offers 3.3V for the HC06 bluetooth module. Adding a small switch into the data line allows the choice of USB (for SW updates) or Bluetooth (for normal use). It works fine with Stellarium software on my laptop and WiFi is still available for internet connection.

if you want the same stand as in the photo. This is a free 3d printer model https://www.thingiverse.com/thing:4883660

@powersoft Hi, it is a very nice project! Maybe you can share your code with me?

Very nice.

@sebastien Nice to see other enthusiasts contribute to the knowledge base!

Hello @ajb2k3 I've just checked. Above blocks work for me with an M5Core2 as well. Instead of TX=17 / RX=16 I use TX=14 / RX=13. That said I do not have the RS485 unit so I am using the little RS485 board (which came with the LAN module) albeit outside the LAN module connected via a BUS module. The ACSSR is powered from an external 12 V power supply. The little RS485 board is powered with 5 V from the M5Core2. There are only two wires between the ACSSR and the little RS485 board: A <-> A and B <-> B. I also added an 120 Ohm resistor between A and B of the little RS485 board. The ACSSR already has that resistor in place internally. Thanks Felix

Hello guys The issue is a divide by zero, caused by the ledcSetup(TON_PIN_CHANNEL, 0, 13); function call found by @a4x4kiwi (thanks for that). I found that the outcome is different depending on the Arduino version used: Arduino 1.0.6 - no error, no crash Arduino 2.0.1 - no error, no crash Arduino 2.0.2 - crash Arduino 2.0.3 - error, no crash E (4532) ledc: freq_hz=0 duty_resolution=13 [ 4537][E][esp32-hal-ledc.c:75] ledcSetup(): ledc setup failed! Thanks Felix

Hello @jimmyb thank you for reporting back. I am glad you found a solution. And good luck with your project. Thanks Felix

https://shop.m5stack.com/pages/download choose M5Burner download The picture is a factory test example(Core2 factory test firmware)

Ok, will order the "new" version when its back in stock.