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• Modules
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  J

  IMG_8101.jpg

  Yes - that is the resistor. Once I lifted the one leg (after removing the solder) the 120 OHM resistance was not measured across Can Hi and Can Low. I sure wish they had put in a jumper.

• FAQS

  When you meet problems using M5Stack, we help you solve it.

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  H

  To create a server with SIM800L, use GPRS to get a dynamic IP from your carrier. Enable TCP listening with AT+CIPSERVER=1,80. Forward incoming data to your M5Stack via serial. Since the IP is dynamic, use a DDNS service or periodically send the IP via SMS/email. Alternatively, have the M5Stack poll a cloud server for commands. SIM800L has limited capabilities, so keep the website simple (raw HTTP requests). Check the SIM800L AT command manual for TCP/IP setup details.

• Units
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  C

  Hi M5Stack team,

  I’m currently developing with the M5StickC using the Arduino IDE, and working with the Unit Roller485 Lite module in I2C mode.

  I’ve set the module to Speed Mode using RollerI2C.setMode(ROLLER_MODE_SPEED), and tried reading the encoder counter using RollerI2C.getDialCounter().

  However, I noticed that the counter value only changes when the module is set to ROLLER_MODE_ENCODER. While in Speed Mode, getDialCounter() always returns the same value, even though the motor is moving.

  From the currently available documentation and APIs, I couldn’t find any way to retrieve encoder counter values while in Speed Mode.

  My questions are:
  1. Is it possible to read the encoder counter value in I2C mode while the motor is operating in Speed Mode?
  2. I’m not looking to switch modes dynamically. I would like to read the encoder value independently of the current mode — is this supported?
  3. If not currently supported, is there any plan to add this functionality in future firmware or library updates?

  Thank you for your support.

• Cores

  Core2 for AWS M5Stack Fire M5stack Grey M5 Stick/StickC M5GO FACES Kit M5Stick V Core 2
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  F

  Hello @wjcarpenter

  the battery charging IC is TP4057 and battery voltage is measured via R40 / R41 into GPI38. See second page of the schematics here.

  Thanks
  Felix

• Bases
  50
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  G

  @yuyun2000
  Hi, I used the chat, but it didn’t help.

  I’m using a similar code with Pulse mode:

  AtomS3 Lite + QRCode2 Base = 230mA
  AtomS3 Lite + QRCode1.1 Base = 75mA

  That’s too big of a difference when using a battery.

  import os, sys, io import M5 from M5 import * import time from base import AtomicQRCode2Base base_qrcode2 = None def setup(): global base_qrcode2, data M5.begin() base_qrcode2 = AtomicQRCode2Base(2, 5, 6, 7) base_qrcode2.set_trigger_mode(base_qrcode2.TRIGGER_MODE_PULSE) base_qrcode2.set_trig(0) time.sleep_ms(30) base_qrcode2.set_trig(1) print('take measurements') def loop(): global base_qrcode2, data time.sleep_ms(30)
• Atom

  For topics on the M5Stack Atom.

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  T

  @yuyun2000 Thank you for your response. I will try it out with Arduino as soon as possible.

  Just a quick question to make sure we're on the same page. We are talking about the integrated IMU in the AtomS3R, no external accelerometer, right?

  I will try to find more details in the documentation, but as far as I can see, the only place where the IMU is mentioned in the schematics is the IMU_INT that's connected to this XTAL_32K_N.

  I will update you as soon as I have news.