The connector is JST SH 1.00mm

Thanks @felmue, I have now got the card powered by following your observations : connecting 5v to VIN, GND to GND, TX to RXD, RX to TXD I don't need to trigger PWK to get the modem operational. The modem don't connect to the network, but that's another problem..

In my railway project I use 12V in but only get 5V out max 0xff stops the motors. Wire.write((speed >> 8)&0x80); Needs to be Wire.write((speed >> 8)&0x00); for the second channel.

Hi @felmue, Yes, I mean that module. I will look into the documentation you provided, thank you. Regarding the number of servos I mandated the student - i teach art students - to scale down from his initial proposal of 24 servos, because of the logistics implied. He came to the class, proposing 13 servos with this module arguing that it should work, so here we are, trying to make it work. Thank you for your time.

Hello @Thomasx sorry, I meant this blue one - which is stackable (it's also EOL though). But if yours is black then guess you have the COMX LoraWAN. Thanks Felix

@Thomasx Please show me the picture.

@felmue said in M5Stamp C3 programming examples: Hello @ajb2k3 What worked for me on macOS Big Sur 11.5.2 is using the ESP32C3 built-in USB via GPIO18 and GPIO19. What also worked for me on macOS Big Sur 11.5.2 was downloading and installing this driver CH9102_VCP_SER_MacOS from here. After a reboot and plugging in M5StampC3 via USB this port show up /dev/cu.wchusbserial... (in addition to /dev/cu.usbmodem... which did not work). Thanks Felix Hello Felix read here for a possible solution.

Hello @NilZ Note: I do not own an IoT BASE CatM so my conclusions might be incorrect. Firstly M5Core2 for AWS (orange) is the same as M5Core2 (white) - well, except for the color. The secure element (ATECC608) is in the M5GO Bottom2 for AWS (dark gray). From the specs: The M5GO Bottom2 for AWS adds additional features and security for IoT applications. ... the onboard Microchip ATECC608 Trust&GO crypto-authentication chip is pre-provisioned with secure keys to simplify connectivity to AWS and accelerate cryptographic computation. ... In other words to physically stack the IoT Base CatM to the M5Core2 for AWS you have to un-stack the M5GO Bottom2 for AWS first and by doing so you don't have the secure element anymore which I believe is required to connect to AWS. So if you plan to use the SIM7080G to connect to AWS (instead of WiFi) I think the story ends here as you can only have either the SIM7080G or the secure element stacked to the M5Core2 at one time. If your question however is whether a plain M5Core2 (orange or white) can be used with the IoT Base CatM, then the answer is yes. The only thing you need to observe is that between M5Stack (Fire, Base, Gray) and M5Core2 some GPIOs have been changed - so the Arduino example (which is written for M5Stack) needs to be adapted for M5Core2. This list can help you with that. Thanks Felix

Hi @ajb2k3 - Thanks for the reply. I gather it will take awhile before the M5 gets its hardware updated - the current NRND status is rather "fresh", from 10/2021.

Hello @ecasti glad to hear you got it working and thank you for reporting back. Happy New Year! Felix

Hi! Did you find any information about the M012 stepper module? I just bought one as well and am having a lot of difficulty finding information about commands, and basically how to run it from a Raspberry Pi 4. Any info you have found would be useful! I cant find any Python code anyone may have written for it.

Hi - I did try the example and it works. But it works whether any pin is connected to INT - pin 17, pin 35 or no pin at all. INT drives interrupt responses and perhaps this really doesn't use any interrupts - but then why connect P35 at all? The rar looks to have the same pin assignment as above in avrpins.h - pin 17 to INT. I am wondering if I've missed something here!

Hello @Radu this is not an actual IC but the describes the M5Stack bus connector which is used for the interconnection between M5Stack cores and modules. Thanks Felix

The UART in question, is that the M5STACK bus IC ? What part number is it ?