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1091
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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

318
Topics

1180
Posts

C

Just hooked up the vibration motor to M5Core and had the same problems as you had ... The vibration motor went up to > 1 Amp and the M5Core went into brownout ... I think the M5Stack Vibration Motor N20 uses the same schematic as the M5Stack N20 Propeller Unit ... ...i think the M5 Stack team screwed up with the resistors used for the control of the AO3400A mosfet : R2 as a pull down resistor should be 10k Ohm instead of 51k Ohm ! R1 as a current limiting resistor schould be 200 Ohm - 1K Ohm
FAQS

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

157
Topics

765
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J

Hello, Anybody here to help me on this blocking point? Thank you Best regards
Cores

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

953
Topics

4264
Posts

Err yeh cold boot the mac it is very susceptible to the unavailable resource issue. And yes press the reset button on the core2 the time period is a fraction of a second and took me over 20 tries to do it.
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.

119
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Follow my video here: https://youtu.be/Pdo1ipf62VU

PRODUCTS

N

Some questions...
• NilZ

8

0
Votes

8
Posts

3446
Views

@felmue said in Some questions...: Hello @ajb2k3 I think you might still be thinking about the wrong module. (I know it's a bit confusing as both these modules are listed on the specs page.) The Stepmotor Driver Module (HR8825) uses an TCA9554 and not an STM32. So no open source firmware as far as I can see. Thanks Felix I think you may be thinking of the servo module as the ones I have and the product title shows AATMEGA328 the 13.2 uses the STM32
Stamp-C3 and I2C
• Bram

2

0
Votes

2
Posts

1856
Views

Hello @Bram have a look at this thread. Thanks Felix
M

M5STICK-C - Windows 10 no longer recognizes it when plugged in.
• MrGadget

1

0
Votes

1
Posts

1199
Views

No one has replied
P

Can JRD-4035 get the information of MetalTag which is the closest to JRD-4035?
• PAOPAO

1

0
Votes

1
Posts

1376
Views

No one has replied
S

Lora Module - What plug is the external antenna using?
• SarahC

2

0
Votes

2
Posts

1768
Views

S

Support have contacted me, it's an MCX connector! The one on the LoRa module is female, so the plug you buy needs to be an MCX Male connector. I've bought these converters for SMA plugs: https://www.amazon.co.uk/gp/product/B012THC0FO The MCX connector is exactly the same one as on most of the SDR USB sticks... https://www.amazon.co.uk/TenYua-Digital-Receiver-RTL2832U-R820T2 So if you already have a USB software defined radio hanging around, the rubbish little twig antenna can be cut off the cable, and it reused as a J antenna cable!
E

ATOMIC QR-CODE READER - Documentation - Trigger in Host Mode
• exouser

1

0
Votes

1
Posts

980
Views

No one has replied
P

Is function of UHF-RFID-JRD-4035 only reading IC tag information ?
• PAOPAO

3

0
Votes

3
Posts

2407
Views

P

@m5stack san, Thank you very much for your kindly reply!
I

How to get API key from unitv2
• ilikeurstyle

1

0
Votes

1
Posts

779
Views

No one has replied
I

Getting started with UnitV2
• ilikeurstyle

1

0
Votes

1
Posts

934
Views

No one has replied
_

BASE26 compatibility with Core2?
• _Rob

4

0
Votes

4
Posts

2802
Views

The vibration sensor of M5Core2 and M5 Base series are incompatible in mechanical design. Please do not stack them together.
F

SKU:U087 with Raspberry Pi 4
• FPI

1

0
Votes

1
Posts

1197
Views

No one has replied
D

unable to load code stampc3
• Devan

3

0
Votes

3
Posts

1665
Views

Sorry I’ve been busy with projects and Stamp Pico D4 examples. Something I need to check is does it work using the C3 internal usb programmer
M

M5Stamp C3 powered by alkaline batteries
• maurymaury

1

0
Votes

1
Posts

947
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No one has replied
H

M5Stamp C3 and Arduino IDE
• HaSch

8

1
Votes

8
Posts

7570
Views

H

@felmue said in M5Stamp C3 and Arduino IDE: Hello @HaSch The error message looks familiar - see this thread. Thanks Felix I looked at this thread but it didn't work for me. Grounding Pin 9 and trying to flash ends with the same result. How can I use another TTL2USB port? I only have the one provided using the board.
W

ATOM RS-485 - No power via USB
• watchforstock

2

0
Votes

2
Posts

1254
Views

Hello @watchforstock looking at the ATOM RS485 schematic the only way I see which would keep the M5Atom from powering up when plugged into the ATOM RS485 is if somehow the 5 V line is (partly) shorted to GND. Now, there is a built-in DC-DC converter in the ATOM RS485 converting the input voltage from the RS485 connector to 5 V. In your case however this DC-DC converter is not fed an input voltage. Maybe the DC-DC converter IC didn't like the fact it was fed 5 V into its output from the M5Atom. You could try to measure the 5 V on the Groove connector while the M5Atom is plugged into the ATOM RS485 to see if it somehow is pulled down. Thanks Felix
P

Is it safe to Power m5paper and m5ink with fast charge 20W power banks?
• pritambarhate

1

0
Votes

1
Posts

1306
Views

No one has replied
R

Measuring energy consumption with M5stack basic
• robertobruzzese

3

0
Votes

3
Posts

1891
Views

R

Thank You Felmue. The source code that is mentioned in the post you linked should be run in arduino ? Thank you
F

UIFlow server connection unresponsive after reboot of Core2
• falbriard

1

0
Votes

1
Posts

1335
Views

No one has replied
L

Core2 is not a finished product
• littlbee

4

0
Votes

4
Posts

2988
Views

L

@ajb2k3 But then how comes I have an issue with the Core 2 but none with the M5Paper ? I have installed the CP210X driver manually, ie not using any standard driver from Win10. If both devices use the DOWDQ6 they should end up behaving the same way, no? For the UIFlow menu on the Core2, at least after a reboot I can get to UIFlow in wifi mode. I takes several tries usually as it seems the touchscreen is not always immediately responsive. But at least I can reboot, put it back on UIFlow wifi mode and upload new versions of code.
T

UWB U100 slow positioning/ranging behavior
• thatonecheetah

1

1
Votes

1
Posts

940
Views

No one has replied

5 / 19

Modules

Units

FAQS

Cores

Bases

Atom

Some questions... • NilZ

Stamp-C3 and I2C • Bram

M5STICK-C - Windows 10 no longer recognizes it when plugged in. • MrGadget

Can JRD-4035 get the information of MetalTag which is the closest to JRD-4035? • PAOPAO

Lora Module - What plug is the external antenna using? • SarahC

ATOMIC QR-CODE READER - Documentation - Trigger in Host Mode • exouser

Is function of UHF-RFID-JRD-4035 only reading IC tag information ? • PAOPAO

How to get API key from unitv2 • ilikeurstyle

Getting started with UnitV2 • ilikeurstyle

BASE26 compatibility with Core2? • _Rob

SKU:U087 with Raspberry Pi 4 • FPI

unable to load code stampc3 • Devan

M5Stamp C3 powered by alkaline batteries • maurymaury

M5Stamp C3 and Arduino IDE • HaSch

ATOM RS-485 - No power via USB • watchforstock

Is it safe to Power m5paper and m5ink with fast charge 20W power banks? • pritambarhate

Measuring energy consumption with M5stack basic • robertobruzzese

UIFlow server connection unresponsive after reboot of Core2 • falbriard

Core2 is not a finished product • littlbee

UWB U100 slow positioning/ranging behavior • thatonecheetah

Some questions...
• NilZ

Stamp-C3 and I2C
• Bram

M5STICK-C - Windows 10 no longer recognizes it when plugged in.
• MrGadget

Can JRD-4035 get the information of MetalTag which is the closest to JRD-4035?
• PAOPAO

Lora Module - What plug is the external antenna using?
• SarahC

ATOMIC QR-CODE READER - Documentation - Trigger in Host Mode
• exouser

Is function of UHF-RFID-JRD-4035 only reading IC tag information ?
• PAOPAO

How to get API key from unitv2
• ilikeurstyle

Getting started with UnitV2
• ilikeurstyle

BASE26 compatibility with Core2?
• _Rob

SKU:U087 with Raspberry Pi 4
• FPI

unable to load code stampc3
• Devan

M5Stamp C3 powered by alkaline batteries
• maurymaury

M5Stamp C3 and Arduino IDE
• HaSch

ATOM RS-485 - No power via USB
• watchforstock

Is it safe to Power m5paper and m5ink with fast charge 20W power banks?
• pritambarhate

Measuring energy consumption with M5stack basic
• robertobruzzese

UIFlow server connection unresponsive after reboot of Core2
• falbriard

Core2 is not a finished product
• littlbee

UWB U100 slow positioning/ranging behavior
• thatonecheetah