Hello @ecasti

glad to hear you got it working and thank you for reporting back.

Happy New Year!

Felix

Hello @davidgs

Hmm, I can scan the I2C bus just fine using port A (GPIO0 and GPIO1):

Wire.begin(GPIO_NUM_1, GPIO_NUM_0);

I2C requires pull-up resistors on both lines. GPIO8 already has a 10k pull-up resistor. Did you add a pull-up resistor to GPIO7 as well? Some I2C slave devices might already have pull-up resistors in place tough.

Edit: I've just tried with GPIO7 and GPIO8. The I2C scan works with those two GPIOs for me as well.

Thanks
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 ?

Hello @EKTan

Note: I don't own a BTC Base so my conclusions could be incorrect.

that said, the BTC Base is mainly for M5Stack (Base and Gray) which include the Battery Bottom. So mechanically you'll need at least a Battery Bottom stacked to the M5Core2 to make it work with the BTC Base.

Note: in order to be able to stack the Battery Bottom to the M5Core2 you'll have to remove the small board (which contains the IMU and the microphone) as well as the bottom already installed on the M5Core2. By doing so you'll lose the IMU and the microphone.

Note: the Battery Bottom only is available in gray or black.

Thanks
Felix

Hello @remaille

it should work with LoRaWAN, but as you already mentioned DIO1 needs to be connected to a GPIO on the M-Bus. I found this article (sorry, it's in German).

Thanks
Felix

Is there an adapter to use with the existing DC encoder motors that come with standard JST connectors like this (https://www.robotshop.com/ca/en/lynxmotion-12v-450-rpm-1018oz-in-152-brushed-dc-gear-motor-w--encoder.html)?

I would be very interested in getting your adopted code. I have not been able to get the thermal unit to work with any of the examples.

@felmue said in GoPlus2 Port B with servo with UIFlow:

Hello @xs

I think you are out of luck here. A servo requires a PWM (pulse wide modulation) signal, however the three B ports on the GoPlus2 are only good for simple input and output signals but cannot do PWM.

The GoPlus2 description reads: Three PORT-B interfaces(Analog Input,Digital Output,Digital Input) can be expanded.

And looking at the GoPlus2 blocks in UIFlow the digital output can only be set to 0 or 1, but nothing like PWM.

Thanks
Felix

Thanks, that's what I want to know. I'll use the B Port in the M5Go base instead. Thank you so much.

更新到最新版IDE后，上述功能被移除了。
CORE2连基本绘制几何图形除了线之后都是程序实现了。
但是程序绘制后和LCD交互有些问题，估计要等IDE进一步升级解决了
另外，强烈建议IDE开发成PYTHON交互的，现在的只能图形编，程序那边只能参考啊。

@felmue said in COM.X 915 Doesn't respond:

AT+LORAWAN=?
Thank you for the help. That was all it was. I fired it back up again and issues commands from the correct command set and it seems to be working. Now to try it out more.

Thank you!
Kelly

Hello @bob_isat

all COM.X modules have an internal DC-DC converter which takes the voltage applied at the external power jack (from 5 V to 12 V) and converts it to 5.4 V (or less).

The M5Stack device (if powered from the COM.X module) always gets those 5.4 V (or less) from the output of that internal DC-DC converter (independent of whether switch S1 is set to 5 V or 12 V). So no, the 12 V are not being sent to the M5Stack device.

The switch (S1) only selects the voltage going to the LoRa board, which can either be the voltage applied at the external power jack (if S1 is set to 12 V) or the 5.4 V output from the internal DC-DC converter (if S1 is set to 5 V).

On the LoRa board itself is yet another DC-DC converter which creates 3.3 V for the LoRa chip. It's hard to find the proper datasheet for this DC-DC converter, but I think its input range is up to 18 V. So feeding it with 12 V should be fine.

I know, it's quite confusing and it took me more than one attempt to figure it out (and I could still be wrong).

I personally set the switch (S1) to 5 V and use an external power supply set to about 6 V. This allows the internal DC-DC converter to actually produce 5.4 V which then is used for both the LoRa board and the M5Stack device.

If you only use an external power supply with 5 V then the internal DC-DC converter will only produce about 4.7 V (which might be marginal in some cases).

Thanks
Felix

Hello @bob_isat

cool. Glad you got it working. And thanks for reporting back.

Thanks
Felix