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H

@crami25 That you for these links. I am now working n reading mail. After trying to figure out which mail server works the best with POP3 (was not able to get even contact with the op3 server of Google and Outlook despite the many variations in settings I used), I now found a hosting server. Now fiddling out why the AT-POP3READ command does not give some response that makes sense although all the other POP3 commands return a valid response . Regards
Units

320
Topics

1185
Posts

T

Hi All In the ENVIII unit temp/humidity/baro sensor, the barometric sensor is the QMP6988, and this can also be used to calculate altitude. In the QMP6988.h file line 138, there is a line for this: float calcAltitude(float pressure, float temp); ... meaning you can call that method (calcAltitude) from the class in your .ino file. Does anyone know which are the correct units (degC or degF) required for the float temp entry please? And also what units are returned for the calcAltitude (feet, meters etc)? Many thanks.
FAQS

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

157
Topics

769
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J

Hello @ajb2k3 I took a look on your UIFlow handbook for some examples on serial communication. I found this: It seems the code is almost the same than the one generated for me by UIFlow. The imported libraries are the same than the ones I have in my code: from m5stack import from m5ui import from uiflow import On the example provided by my reader's provider; they import this library: " #include <SoftwareSerial.h>" https://wiki.seeedstudio.com/Grove-125KHz_RFID_Reader/#play-with-arduino But I think this is the implémentation for Arduino and I guess the equivalent UIFlow libraries are loaded through this: from m5stack import from m5ui import from uiflow import Do I miss something ? On my side I think the reader works because when I bring a RFID tag close to it; the status led of the reader lights up. But I still receive nothing on the M5 core RX PIN Thank you for your help Best regards
Cores

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

961
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4286
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K

I have a new M5Stack Core2 that was working perfectly on arrival with the pre-installed factory test program. I used M5Burner to install UIFlow_Core2 and that worked. I was able to use flow.m5stack.com to send simple programs to the device and everything I tried worked. I then used M5Burner to re-install Core2FactoryTest and the burn appeared to work but the device then entered an infinite boot loop, reporting (via the serial monitor): ets Jul 29 2019 12:21:46 rst:0xc (SW_CPU_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:1 load:0x3fff0030,len:1100 ho 0 tail 12 room 4 load:0x40078000,len:12308 load:0x40080400,len:3076 entry 0x400805ec Guru Meditation Error: Core 1 panic'ed (IllegalInstruction). Exception was unhandled. Memory dump at 0x400f2f20: 443a20c2 0d0e272a 02a8130c etc I've tried re-installing UIFlow_Core2 and Core2FactoryTest several times. Each time, UIFlow_Core2 works perfectly and Core2FactoryTest fails as described. I've also tried several other programs via M5Burner: some work and some fail to boot, some with "IllegalInstruction", some with "InstrFetchProhibited". Any ideas? I suspect a hardware fault but can't reconcile that possibility with the fact that some programs work.
Bases

32
Topics

141
Posts

B

Yes, it worked ;-). I locked myself up in the office for the last 48 hours. And rewrote AsyncWebserver but using Ethernet.h instead of LWiP. All features of AsyncWebserver are available, the only thing you need to take care of is the periodic upkeep (a single line of code in the main loop). I also added an updater for the internal ESP clock (separate) to update over NTP via Ethernet.h. All in all it took the most out of the past 48 hours but for me it was very worthwhile. Consumed progmem is less than half of what is was (total program went down from 1.1MB to 604kB). Static ram usage went down from (critical 90%) to a comfortable 35%. Dynamic Ram usage decreased by a 40%. All of this is probably mostly due to the fact that we can rely on the W5500's internal IP stack instead of LWiP. Another gain for me is that the periodic upkeep is very predictible, making my main control loop (which also runs RS485) more stable and very predictible. Loop time is now (very) stable at under a ms. Wheres with LWiP it would vary a lot under network load. As an embedded system engineer (by background) this is one of the things that pleases me the most. I can serve a 60MB file or even upload a large file (limited only by storage) to the system without noticable impact on the main process. Performance wise it seems to be a tad slower for now than LWiP over WiFi with AsyncWebserver. Serving the webui of around 3MB takes about a second longer at roughly 4 seconds to fully load. But there is plenty room for optimization as i now only use a single socket buffer of 2048kB in the w5500 at a time. So there is about 8 times as much performance available. I'll most likely make a Github page for this if there is any interest from the community. For now i'm going to have a good sleep 😉👍
Atom

For topics on the M5Stack Atom.

121
Topics

373
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F

Good info; thanks everyone

PRODUCTS

R

M5stack original firmware (binary)
• rbc

5

0
Votes

5
Posts

18892
Views

I also flashed mine with micropython. To get it back to the factory program that came installed, I connected it to the Arduino IDE, selected Tools > Board: M5Stack-Core-ESP32. Next I opened: File > Examples > M5Stack > Basics > FactoryTest. Upload that to the m5stack and you should be back to the factory program. If you don't have the M5Stack custom libraries, you can install it from Sketch > Include Library > Manage Libraries... Type m5stack in the filter box, select the result, and install the latest version.
D

Hardware suggestions for next version of products
• DoNcK

3

1
Votes

3
Posts

5869
Views

yes, i will change the design. thank you!
L

How to test we compile a M5Stack ?
• LaurentG

3

0
Votes

3
Posts

6317
Views

try: #ifdef ARDUINO_M5Stack-Core-ESP32 as is declared in arduino boards: https://github.com/espressif/arduino-esp32/blob/master/boards.txt#L1169 but this is temporary solution because hyphens are not valid for arduino. We waiting for some changes... "issue" is added: https://github.com/m5stack/M5Stack/issues/41
P

Newest M5Stack with 4MB psRAM
• pkourany

2

0
Votes

2
Posts

5970
Views

@pkourany Hi, You don't need to enable the PSRAM to run standard sketches in the Arduino IDE. The Arduino IDE does not act on a low enough level for it to write directly to the PSRAM... you have to use something else like the ESP Flash Download Tool, which is used for example when you load Micro Python onto the M5Stack. Or the ESP-IDF compiler / flashing program.... Both are discussed here: http://iot-bits.com/esp32/esp32-flash-download-tool-tutorial/ The ESP Flash Download Tool is easier to setup and use than the ESP-IDF compiler / flashing program.
S

Interupt pin for build-in MPU9250
• Sterpa

2

0
Votes

2
Posts

3576
Views

i am sorry that no interupt pin for mpu9250, just link the sda and scl. there are no enough pins from esp32
L

M5Stack and esp-idf
• lim

2

0
Votes

2
Posts

5778
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@lim All ESP32 applications running on any ESP32 board, including M5Stack are built using esp-idf. esp-idf is not FreeRTOS. FreeRTOS is included into esp-idf (as a component) and is slightly modified version of the official FreeRTOS (see esp-idf documentation). The mentioned drivers are not the part of the esp-idf, but are built on-top of esp-idf and uses the esp-idf API.
Board header pin part numbers
• suremicro

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0
Votes

4
Posts

8752
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@zazar Ah yes - sorry - forgot about that note ..... that is right. Perhaps you could order a battery module ? They are handy to have.
S

problem with m5stack (with mpu9250)
• Suslikman

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0
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5
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9830
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@suslikman I am using M5Stack with Windows 10 - 64 bit on 3 different systems and M5Stack works fine on all. No issues. On one machine originally the drivers did not install correctly - though it wasn't obvious at the time. To check driver installation worked correctly: Dis-connect M5Stack from PC if connected. Turn up PC volume. Open device manager. Connect M5Stack using USB cable.... once M5Stack is connected, you should hear a Windows sound - "bing""- and now in the device manager a new item should magically appear called "Ports” Click on it – it should show the Silicon Labs driver listed. If not , you need to re-install the driver - make sure Python is on your Windows path. You can verify the path is working by opening command prompt and typing - python. Are these files (below) available after you have Python installed and after you run get.exe ? They should be.
M5Stack with psRAM flash size
• loboris

4

0
Votes

4
Posts

8290
Views

u can order by jimmyLai@m5STack.com. the same price of the psram for u, PayPal is both okay, and the Gpio16/17 are used by PSRAM, so it is not available to use the serial2 when psram is running.
S

Stack is dead :(
• snmcma

10

0
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10
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20220
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S

@snmcma 在 Stack is dead :( 中说： @m5stack 在 Stack is dead :( 中说： you mean Arduino? Yes, Arduino can throw off the firmware file for overwriting in m5? and a screenshot how to write down you can throw off all the firmware files with the instruction how to return to the initial state, micropyton does not suit me. I reprogrammed it as an esp32 dev module, unfortunately in m5stack mode it is not programmed
S

Sim800l module
• Souheil

4

0
Votes

4
Posts

7843
Views

no serial1, m5stack offer serial0 and serial2
S

This topic is deleted!
• Souheil

1

0
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1
Posts

2
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No one has replied
A

Simple fix when upload fails.
• appie

6

3
Votes

6
Posts

13077
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M

If you do not have a capacitor available, you can also try to set the "Upload Speed" to 115200 in Arduino IDE. Of course the uploads are longer, but it did the job for me : i did not have any upload error since I also installed the latest CP210x Windows driver (v10.1.1 for Windows 10) but i don't think this is necessary
Schematics
• loboris

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0
Votes

3
Posts

8893
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A

Can you convert the pcbdoc to version 5 (so it is compatible with EasyEDA) or to another more open format. Few of us have Altium
D

LoRa (or other) module's prototyping area
• dda

1

0
Votes

1
Posts

3719
Views

No one has replied
V

m5stack lcd bug?
• vvs551

1

0
Votes

1
Posts

3720
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No one has replied
S

Where is m5stack available for purchase?
• sukeshak

9

0
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9
Posts

19992
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M

Im get it. Thanks! Now im succesfull connect it via Wi-Fi to my sensor (sensor=mpu6050+esp12). There are was some problems with UDP connetions but now solve it.
M

can M5stack also be compiled by esp IDF?
• mzkoluh

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0
Votes

2
Posts

4401
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No one has replied
T

Battery turn off / on
• tonywestonuk

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0
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2
Posts

13027
Views

M

Hi, It is a built-in function of PMU. One pressing will only reset the ESP32, double pressing will be treated as power off, so the PMU will directly cut-off the MCU's power. We may supply modifying such functions in the future hardware releases.
T

HelloWorld!
• tonywestonuk

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No one has replied

19 / 20

Modules

Units

FAQS

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Bases

Atom

M5stack original firmware (binary) • rbc

Hardware suggestions for next version of products • DoNcK

How to test we compile a M5Stack ? • LaurentG

Newest M5Stack with 4MB psRAM • pkourany

Interupt pin for build-in MPU9250 • Sterpa

M5Stack and esp-idf • lim

Board header pin part numbers • suremicro

problem with m5stack (with mpu9250) • Suslikman

M5Stack with psRAM flash size • loboris

Stack is dead :( • snmcma

Sim800l module • Souheil

This topic is deleted! • Souheil

Simple fix when upload fails. • appie

Schematics • loboris

LoRa (or other) module's prototyping area • dda

m5stack lcd bug? • vvs551

Where is m5stack available for purchase? • sukeshak

can M5stack also be compiled by esp IDF? • mzkoluh

Battery turn off / on • tonywestonuk

HelloWorld! • tonywestonuk

M5stack original firmware (binary)
• rbc

Hardware suggestions for next version of products
• DoNcK

How to test we compile a M5Stack ?
• LaurentG

Newest M5Stack with 4MB psRAM
• pkourany

Interupt pin for build-in MPU9250
• Sterpa

M5Stack and esp-idf
• lim

Board header pin part numbers
• suremicro

problem with m5stack (with mpu9250)
• Suslikman

M5Stack with psRAM flash size
• loboris

Stack is dead :(
• snmcma

Sim800l module
• Souheil

This topic is deleted!
• Souheil

Simple fix when upload fails.
• appie

Schematics
• loboris

LoRa (or other) module's prototyping area
• dda

m5stack lcd bug?
• vvs551

Where is m5stack available for purchase?
• sukeshak

can M5stack also be compiled by esp IDF?
• mzkoluh

Battery turn off / on
• tonywestonuk

HelloWorld!
• tonywestonuk