I have added one more block for enabling power from Servo2 module and the new Servo2.m5b can be found here: https://gitlab.com/ove.risberg/uiflowblockservo2

You still need the battery in M5Core2 or USB cable connected since the current firmware is turning off external power shortly after boot so your M5 will poweroff if no USB cable or the internal battery is connected... if the new "Servo2 enable external power" block is used the external power is enabled and you can disconnect the USB cable.

The internal battery should be charged by the external power after the new "Servo2 enable external power" block is used.

Thanks to @felmue for the code used in the new "Servo2 enable external power" block!

Thanks, I already found a library that works with the M5core.
https://github.com/emelianov/modbus-esp8266/

https://docs.m5stack.com/#/en/base/plc_base

Always happy to help :)

@sodoku said in Cable for motor encoder module:

"jst sh 6 pin".

Oh ... I see a big problem !
There are 1m, 1,25,, and 2,5 mm conectors and I think they are the 1mm types using.
But I cannot find one with longer wire - only 10 or 15 cm with open end cables. Open end would be no problem, but I need minimum 30cm - 50 cm would be best.

Can anyone from M5Stack give me an order source , please.

Oh - I made a mistake !
It is not the software "M5burner" - this is clear for me - excuse me.

I do not understand "EasyLoader".
This software is mentioned on the top of every documentation and there are different versions for every unit.
But what is the software flashing ? -
I know that EasyLoader flashing "a firmware" - but were is it from and what firmware ?

Is it a kind of update service ?

In one topic of this forum it is said, that I can cange the I2C adress with this software. I have only change a line value inside a file or script ??? no more info.

Do you know more about that software and how it is working ?

Thank you again for your helpful answers.
regards
K.D.

p.s. I'm exited too about M5Stack and I want to use it in a autonomous vehicle. That's why I'm asking for the use of multiple sensors and motors.

Hello @ramaker

from looking at both schematics (M5Core Fire and GoPlus) I'd say:

An external power supply will power the M5Core Fire, but it won't charge the battery. (If you look at the M5Core Fire schematic you'll see that only USB can charge the battery, but not the 5 volts coming from the GoPlus).

Depends on the motors and the USB power supply. If the USB power supply is strong enough it should be able to power both, M5CoreFire and the motor.

The voltage for the motor will be lower with option 2 - probably in the area of 4.6 volts. Whereas with option 1 it will be in the area of 6 volts.

Please note: I derived all of the above information purely from looking at the schematics as I don't have the GoPlus module myself, so I could be missing something and my conclusions could be incorrect.

Thanks
Felix

@dukenukke M5Stack library contains an error in LoRaWan.cpp
the definition of first element of array:
const char *physTypeStr[10] = {"EU434", "EU868"....
should be like this:
const char *physTypeStr[10] = {"EU433", "EU868"....
Since module RHF76 doesn't understand command like
AT+DR=EU434

Hi Again,
After some months with my module in "Stand By" I restart again my project using it and I found this info! Thanks a lot I will upgrade the GRBL of it

It is safe, but the battery will charge each other.

@jmakiv I am curious about this as well. I got the module and my sim card from Deutsche Telekom should arrive tomorrow.

I followed up on this project with another that's a real calculator. It was more work than I had anticipated; that might explain why there are so few examples: https://github.com/vkichline/FullCalculator-Arduino
The README includes pictures this time.

Hello John

A couple of M5Stack modules (like GPS) already use a serial connection via GPIO16 and GPIO17. However GPIOs only provide logical voltage levels (0V / +3.3V).

Assuming your source is a standard RS232 device the voltage levels can go down to -15V and up to +15V so you probably need a level converter like this one:

https://www.amazon.com/Serial-Converter-Equipment-Upgrades-Doupont/dp/B01N42QW8X/ref=sr_1_6?crid=2OZ5U3Q7GY5OS&dchild=1&keywords=ttl+rs232+converter&qid=1597992249&sprefix=ttl+rs2%2Caps%2C276&sr=8-6

Cheers
Felix

Hello again

I think the following library should allow you to switch between WiFi or Ethernet OTA:

https://github.com/espressif/arduino-esp32/tree/master/libraries/Update

Use it with either a WiFiClient or EthernetClient client.

Cheers
Felix