Hello @OfureAlakhume the M5Stack M-Bus is described here and the ECG Module seems to use GPIO13, GPIO5, 5 V and GND. Thanks Felix

We have the same problem, I might take a look at the replies

I am in the same situation, I ask for more details thank you in advance

I heard from my supplier that SK6812RGBW has been stopped production and updated to SC6812RGBW,SC6812RGBW quanlity is better than SK6812RGBW. Here is SC6812RGBW led datasheet:http://www.normandled.com/upload/202102/SC6812RGBW LED Datasheet.pdf

Danke @felmue , Your answer pointed me in the right direction. The voltage between GND and BAT pins was indeed 4.0V+, so I went back to check my code. I noticed that the official documentation for the AXP on the M5StickC only mentions M5.Axp.GetVbatData() (which is what I used and what gave me weird readings) but the AXP code example uses M5.Axp.GetBatVoltage() and the latter actually gives me the correct number. What's the difference between these two? Is it just the *1.1/1000? Cheers, Flo

Sound like the battery protection circuit has tripped. Try pluging it into a none intelleegent USB charge for around 5 hours (with the charger switched on) and see if it come to life. If not, it could be that it has died and needs replacing.

@m5stack I supplied 5v to Ⅿ5 BASIC, but it doesn't work. Why? I connected + 5.1v to the pin socket battery and connected -t o GND. Is it not possible to supply power from the pin socket?

Thanks again @world101 , solved. Ho I'm really bad looking for M5Stack documentation, or documentation is missing.

@jchipjonty set power switch to on, plug usb into stickC, plug stickC into hat, wait.

I ask M5stack support, here is their answer: "The 30-Pin connector we are using is a customized one. The pin height with 3mm is no problem to be compatible."

@efried Found solution here : https://community.m5stack.com/post/1394 Add dacWrite (25,0); into the void loop

@johnny241 said in GROVE I2C 5V or 3.3V?: @lukasmaximus comment faire pour implémenter ce convertisseur de niveau logique? https://au.element14.com/adafruit/757/logic-level-converter-4ch-arm/dp/2301651?gclid=EAIaIQobChMI293Q_s-Q6wIVFR4rCh2mQgi4EAQYAiABEgKglvD_BwE&mckv=s_dc|pcrid|432287894085|pkw||pmt||slid||product|2301651|pgrid|102205443084|ptaid|aud-471864486199:pla-902298347457|&CMP=KNC-GAU-GEN-SHOPPING-EMBEDDED-COMPUTERS http://www.farnell.com/datasheets/1683643.pdf?_ga=2.12967607.1498586764.1597062128-969722884.1596265857&_gac=1.39987734.1597062128.EAIaIQobChMI293Q_s-Q6wIVFR4rCh2mQgi4EAQYAiABEgKglvD_BwE

How do you guys track the amperage draw of the stick when sleeping? Do you take it apart, cut a power line, hook up a multimeter in between, and later resolder? Also have you guys experimented with the difference between M5.Axp.DeepSleep(); and esp_deep_sleep_start();? AFAIU Axp.DeepSleep is only supposed to turn off "external devices" (gyro, screen, etc.) but not the ESP itself, right? And @Morris45 what does the Wire.begin(32, 33); line do in your code above? And why are we commenting out M5.begin()? What's the battery life you're getting from your watch? I'm trying to do a simple infrared remote (that only wakes up when you first pres the main button) and even in full deep sleep, I'm only getting 2 days.