Hello @Marc-SKIL unit EXT.IO2 can only control one (1) RGB LED per output. So what you get is correct. Have a look at the protocol here. Thanks Felix

@SirMichael I did some more studying, and came up with the following table: [image: 1733891081546-2d232859-84b4-4421-9143-baaf384d0c65-image.png] I hope this is right! Now, I'm not using the M5Stack bottom board which has the PortB and PortC, so I figure that I can use the RXD2/TXD2 pins as well as the G36 and G26 pins. I'll use those for the other 2 SoftwareSerial ports, and G27 and G19 for the other pins. The thing that I found confusing was that they do list the pins in the M5Stack documents, but they don't really explain what is available to the user. This took a lot more work than it should have! Sir Michael

@pete-manzel As kuriko mentioned before the ID you wrote by M5UHFRFID might be on a different place in the memory (different address) as the sparkfun library try to read it. Are you able to read the raw data and search for your ID? Anyway, there should also be a read only unique Tag ID (TID) that is given by the manufacturer. Can you get that on both readers?

As others have reported, the m5stack "AC-Measure-Unit" (HLW8032) stops updating after about 18seconds if no current is flowing through it. Specifically the LED on the unit goes out, and the Voltage and Current registers stop updating (the UNIT_ACMEASURE_GET_READY_REG returns 0=not-ready). However you can still use functions such as "Serial.printf("getFirmwareVersion()=%u\n",sensor.getFirmwareVersion());" But when current starts again (even as little as 5mA) the "AC-Measure-Unit's" LED turns on again it starts reporing the voltage and current again. (AC Voltage changes do not cause it to start reporting again.) There is a "sensor.jumpBootloader()" function, but this seems to lock up the i2c bus, so you can no longer talk to the module. I am uncertain whether this "stops updating" issue is caused by the m5stack-firmware in the module, or caused by the HLW8032-chip itself stopping updating. The only way I have found to resolve this is to disconnect the 5V power to the AC Measure Unit, and then reconnect it. The "JFET-reset" circuit I use is shown below. Note that the AC-Measure-Unit draws about 30mA at all times, irrespective of if it is reporting data or not. Note also that the AC-Measure-Unit very ocasionally says its working but always returns 0V and 0W. The unit needs resetting to fix this, which can be achieved by completely removing the 5V power (eg. using the below "JFET-reset" circuit). Finally note that (strangelly) the Voltage measurement reported by the AC-Measure-Unit appears to be more accurate when current is flowing: It appears to overread the voltage by approx 5% when it is first turned-on/rebooted (which you need to do if you want a voltage reading when no current is flowing). [image: 1733769519058-83c27bf4-5301-4a3c-bb6d-db6ec9c4d3dd-bs250_mosfet_switch.jpg]

@Leo05 Hi there, any updates on the PT100 support? I'm doing POC on ESP32 and got 4 PT100 sensors working (using 4 MAX31865). Ideally, I'd like to use a module for M5Stack.

I think the MODULE_4_20MA (in the src folder) is only using some standard libraries: From top src/MODULE_4_20MA.h: #ifndef __MODULE_4_20MA_H #define __MODULE_4_20MA_H #include "Arduino.h" #include "Wire.h" Try to download only the two files in the src-folder and see if you can include them into your project and compile. Also: If you look at the code in src/MODULE_4_20MA.cpp you'll see that they include some register addresses, maybe that is required for this AIN4-20mA unit?

@scaramanga have you checked the product listing and documents on the M5Stavk website?

@dnd3ch Most Unit style sensors have a compatibility section, down at the bottom of the sensor's document page: https://docs.m5stack.com/en/unit/DLight Unit Go down to the FAQ section near the bottom. [image: 1731451873959-screenshot-2024-11-12-at-5.51.00-pm-resized.png] Having said that: All of the unit sensors will work with any M5Stack controller. The Dial is just a StampS3 for example. The M5 core bases are another story and require research or asking here if they are compatible.

@usYmat Yes. I am using it to connect to an Android app over BLE. You can look up sampel code for ESP32 for Bluetooth pairing to a device. Seems to work ok.

@sebhuet From the schematic it looks like this is a common IR, so you just need to find the right size.

@kuriko Indeed a strange situation. It occurs if I use TX=26 and RX=32 and also TX=22 and RX=19 to initiate the can BUS on a M5Atom ESP32Can.CANInit(); // Init CAN Module. 初始化Can If i dont initiate WifI I can send data through the CAN BUS. The moment I initiate WiFi, no data come through in the CAN BUS. I will do some other trials with other devices (M5Core 2 and M5Atom S3) to check if it is a hardware problem. I do hope to get this solved because if this problem is definite it means the Communication abilites of the CAN bus are limited. Regards (* Oh, important : When using WiFi i do receive CAN BUS messages , so that is weird, i really need to dive into this*)

Hello @Steven010 have you tried to follow the examples given in the documents listed here? From what I can tell your modem is connected to LTE-M1 but with AT+CIICR (a command that doesn't exist for SIM7080G) you try to setup GPRS which doesn't match LTE. Have a look at for instance the document explaining a TCP/UDP connection. I think your next command should probably be AT+CNACT=0,1 to activate a PDP and then AT+CNACT? to check for an IP address. And then go from there. Thanks Felix

Sad to still see no StampC3 support in uiflow. The risc-v and C3 support in micropython has been around for quite some time, and other C3 boards are in there now.

Thanks everyone!

Hello @gohan_oishii GPIO3 on the ESP32S3 is a strapping pin (see here) and is pulled up via external 10 k resistor (see schematic here). Thanks Felix

Hello @pos3tap hmm, works for me in UIFlow2. Please see example in Project Zone: M5Dial_RFID_Touch_Test_UIFlow2.1.5 Thanks Felix

I should have said I am concerned about the form factor, since the 18650C holds the M5Stick INSIDE its case. I checked the size of each M5Stick product and they are the same size i.e. Product Size 48.225.513.7mm. So the answer should be yes. Thanks anyhow, ajb2k3.