Posts made by felmue

Hello guys

some ideas for the next version of M5StamPLC:

1. switchable 5 V on Grove ports
2. switchable 5 V on extension port
3. LED indicators for the relays
4. LED indicators for the inputs

Notes for 1.: the existing ICs can be used by connecting output (P3) of (U5 PI4IOE5V6408) to the enable (EN) of (U4 LPW5209AB5F) instead of having EN tied to SYS_5V.

Notes for 2.: the existing ICs can be used by connecting output (P1_0) of (U4 AW9523B) to the enable (EN) of (U8 LPW5209AB5F) instead of having EN tied to PMU_5V.

Thanks
Felix

Hello @Krmiller

GetVBusVoltage() exists in M5Core2 library as well. See here.

Thanks
Felix

Hello @Krmiller

have you tried getType() to determine the correct AXP? See here.

For AXP2101 you could try getVBUSVoltage. See here.

Thanks
Felix

Hello @iainmac

you probably need to adjust the GPIOs used for I2C. You can find the GPIOs M5Dial uses for port A here. (Section HY2.0-4P)

Thanks
Felix

Hello @DR_Froggy_rD

I am afraid that doesn't work. A PaHub is for i2C devices (red Grove connector); the PDM unit is an I2S device (white Grove connector).

BTW: that is the reason in UIFlow2 PaHub doesn't show as option when the PDM unit selected.

Thanks
Felix

Hello @rammelsberg

I don't see solder jumpers and I cannot find the source code for the firmware running in M5GoPlus2 so no, I don't think you can easily modify the I2C address.

Thanks
Felix

Hello @s1y99

ok, now I understand - thank you for clarifying about the closed source M5Core firmware.

BTW: for RST and IRQ you could set no jumper and then solder a wire each to the desired GPIO on the M5Stack bus connector.

Thanks
Felix

Hello @s1y99

I am confused. Your own firmware, the one you write for your M5Core (which talks to the LoRa module), is closed source? How come? Are you not writing your own firmware?

I already wrote that it is not possible to jumper LoRa V1.1 the same as the older one, please see my previous post.

MOSI, MISO, SCK and CS/NSS can be setup to use the same GPIOs, however RST and IRQ cannot be jumpered to be the same.

So in conclusion: If for whatever reason the firmware running on M5Core (controlling the LoRa module) cannot be modified then it is not possible to substitute the older LoRa module with the new one.

Thanks
Felix

Hello @RadghKris

I think it might help to include epdiy.h before Unified.h in your code. E.g.

#include <epdiy.h>
#include <M5Unified.h>

Please see this post.

And maybe also check this documentation - Section 6.Program Compilation & Burning.

Thanks
Felix

Hello @drbob

my example should give you a head start. Please have a look here.

Thanks
Felix

Hello @rammelsberg

well, there is an I2C address conflict between M5CoreS3 Touch and M5GoPlus2 as both use I2C address 0x38.

Interestingly when I use M5CoreS3 with M5GoPlus2 in UIFlow2 I can control a servo and use the touch screen. However this is only true for servo 1,2 and 4. When I try to use servo 3 the system locks up.

Note: I have not tried to control DC motors.

So I'd expect some issues and do not recommend to use M5GoPlus2 with M5CoreS3.

Thanks
Felix

Hello @JensH

please check my example in UIFlow2 Project Zone: M5Paper_WLAN_Test_UIFlow2.2.5

Thanks
Felix

Hello @turgu

FWIW: in M5PaperS3 the eInk display is directly controlled by ESP32S3.

In M5Paper the GPIO WaitBusy() checks is GPIO27 which comes directly from IT8951 so I guess if the line never goes HIGH either IT8951 is not (properly) powered or defective.

Anyhow, have you tried to change the code to ignore the busy state of IT8951; maybe add some small delay instead.

BTW: I measured GPIO27 and when M5Paper is running it's being pulled up. I don't see a pull-up resistor in the schematics so I guess IT8951 is pulling it up (when not busy).

Thanks
Felix

Hello @KamilB

I do not have the hardware to test this myself, but I think you might want to pull GPIO12 HIGH to make sure you're talking to BMI270 only. See here.

Thanks
Felix

Hello @obstbauer

I think you might want to call cr.begin() in setup to set stuff like the proper I2C address for the library to use. See here.

Thanks
Felix

Hello @andrew-winton

I don't have a RP4 nor do I have the AIN4-20mA module so my tests might be irrelevant for your setup.

Using an RP3 and about every M5Stack I2C unit I have (RFID, Relay4, PaHub, PbHub, EXTIO, etc.), all of them get detected just fine using i2cdetect -y 1.

That said:

• have you verified that there are proper pull-up resistors on SCL and SDA? (RP should have them by default.)
• have you tried with different wires?
• have you tried w/o supplying 12 v? I think it's redundant looking at the schematic. (External 12 V power also produces BUS_5V which might clash with the 5 V from RP.)
• have you tried to reduce the I2C speed? (default seems to be 100k)

Thanks
Felix

Hello @shiva

please have a look in Project Zone example: M5StickCPlus2_UseTimerToCountSeconds_UIFlow2.2.4

It shows how to use a timer (instead of sleep) to count. Using a timer makes sure a button press is honored all the time.

Thanks
Felix

Hello @xxx_yyy

I stand corrected. My apologies. You are absolutely correct: IMU INT in M5StickCPlus2 is not connected to anything. (I was looking at the RTC INT.)

That said - and to answer your original question - yes, it is possible to connect the IMU INT pin to an ESP32 GPIO. Please see here.

However it would only allow to wake ESP32 from deep/light sleep, but not to turn M5StickCPlus2 back on from being powered off due to the fact that IMU is powered from 3.3 V (and not like RTC from VBAT_IN).

Thanks
Felix

Hello @xxx_yyy

IMU in M5StickCPlus2 is running from the battery and IMU INT is connected to the power on logic. So it should be possible to setup WoM, then turn ESP32 off and then upon motion IMU INT turns ESP32 back on again.

Thanks
Felix

Hello @desmbr

indeed, that doesn't look good. I wonder if maybe the internal battery is defective preventing the power rails from reaching the proper voltages.

Edit: first, however I would unplug the hat and maybe try a different USB power supply.

If you still have warranty, I suggest you ask for a replacement.

If not, you might try to open it and disconnect the battery to see if that helps. These pictures I took a while ago might be helpful opening M5CoreInk.

Thanks
Felix