I can upload a sketch by holding down boot sw while powering up.
USB CDC on Boot is “enabled”
DM sees COM4
Program runs and Serial Output is seen by PuTTy on Com 4
Arduino IDE says it has a problem with the COM4 port but uses it to upload the sketch.
Serial monitor also does not see COM4 but it remains in a coma.
I can just use PuTTy to monitor but it would be nice to use the serial monitor of the IDE.
Any help in resolving this annoyance would be appreciated. Thx
I upload by just clicking Upload in the IDE. No idea what USB CDC is set to. Only use Serial, don't own PuTTy (I am using a Mac)
CDC must be set to enable to print on a board with native USB, like the ESP32-C3.
Which OS are you using and which IDE.
Post your sketch, inside code tags.
Holding the boot button and briefly pusing the reset button will also get the ESP32C3 in upload mode.
Leo..
Thanks for your fast reply:
Using win10 and IDE 2.3.6. Latest Espressif ESP32 Boards installed
As stated in my post my problem is not uploading to the ESP32. My problem is getting the serial monitor to work, it does not seem to recognize Com4 which DM and PuTTy do.
I have used dozens of these boards and never had issues.
Is anything connected to any of the three strapping pins.
Code as follows:
/************************************
const int led = D10;
void setup() {
pinMode(led, OUTPUT);
Serial.begin(115200);
}
void loop() {
digitalWrite(led, HIGH); // turn the LED on
delay(1000); // wait for a second
Serial.print("Hello");
digitalWrite(led, LOW); // turn the LED off
delay(1000); // wait for a second
}
************************************/
The only IO used is D10 [GPIO 010] as Output.
Strapping pins GPIO 02,08 and 09 have no connections to them.
Another thing I noticed is that after code is uploaded, a message “Hard resetting via RTS pin...” appears but I have to do use the manual restart sw. Does this mean that the UART CTS/RTS outputs are not wired on this board to the ESP32CR3 strapping pins?
@wonderplum: @Wawa is trying to help you. Why are you ignoring this request?
Hi @wonderplum.
Please provide a detailed description of what you mean by "says it has a problem". If you are seeing an error or warning message, then post the full and exact text of that message.
Please provide a detailed description of what you mean by "does not see". If you are seeing an error or warning message, then post the full and exact text of that message.
I see no problem with the code.
I uploaded it to a XIAO ESP32C3 board to make sure.
It prints "Hello" in the IDE just fine.
I hope you have used a suitable resistor with your LED.
Leo..
If you could please review my original post… the problem is not to do with uploading/running code, the only problem is that the ‘serial monitor’ and ‘get board info’ cannot see com4, everything else does. DM does, PuTTy does. USB cable must be good. The ESP32C3 was purchased from Digikey so I presume it is good kit and not a clone. Sorry for any mis-understanding.
PS over the next week I will run IDE on alternative computer to see if problem is something to do with my current desktop environment (worth a try eh). Will check back when this is done.
Please provide a detailed description of what you mean by "cannot see". If you are seeing an error or warning message, then post the full and exact text of that message.
Absolutely worth a try. That is an excellent troubleshooting technique if you have access to a different system.
Success!! Fired up my trusty (but very old and slow) ASUS Ultrabook and dusted it off. Here is a system that works i.e compiles, uploads to XIAO-ESP32C3, Serial monitor and Get Board information all work. As a bonus, no need to use Boot/Reset buttons (I did add 2uF capacitor from EN to GND)
Host: i5-3317U CPU @ 1.70GHz 1.70 GHz, 12.0 GB ram, 500GB SSD
Windows 10 Home (64bit)
IDE: Arduino 1.8.19
Boards: ESP32 by Espressif V 3.0.0 (tried 3 times to download 3.3.0 but failed)
USB Driver Provider: Microsoft
USB driver version: 10.0.19041.3636
USB to USB-C cable: same one that I used with my Desktop
Armed with this as a reference point I will go back to my desktop roll back to the above and then revise components until the problem is manifest. Will come back to report on what I find
You do need the boot button to get in upload mode.
I have used/programmed about 30 XIAO ESP32C3 boards and never needed to add a cap.
Leo..
Wawa: I just re-tested my system and truly I did not have to press BOOT or RESET button to upload and run a new program to my XAIO-ESP32C3. From info I found on-line the UART, via the CTS and RST lines manages this. Check it out
Please post a link to that page.
The XIAO ESP32C3 does not have an UART chip.
The C3 has native USB.
I wonder if your boot button is stuck.
That would explain what you're seeing.
Do you hear and feel a distinctive click when pressing it, like the reset button?
You can also measure the voltage on D9 (the boot pin).
It should normally be close to 3.3volt and LOW when the boot button is pressed.
Leo..
Yes: XIAO ESP32C3 UART is not a separate chip but is integrated into the CPU. (I understand that it is designated as JTAG).
I confirm that both BOOT (D9) and RESET (EN) are both normally at 3.3V and 0V when respective PB is pressed.
I see a lot of banter on the web on this auto-boot/auto-reset topic but have not found a conclusive method. Much hype about bad chips, some work, some don’t etc. Anyways I can attest that my configuration Auto-boots and Auto-resets consistently. Am I the only person with a confirmed config that works in this regard? Perhaps the secret lies deep in the Espressif documentation.
I have programmed about 50 ESP32-C3 boards from Ali/eBay.
Never had an issue with programming or SerialPrint.
Then I moved to Seed XIAO ESP32C3 boards bacause of WiFi issues.
Used about 30 so far with zero problems.
I have one on a test bed, which I already have programmed dozens of times.
Using Win11 Pro, currently IDE2.3.4 and still sometimes IDE1.8.19.
Sorry, can't help you more because I don't see any problems here.
Leo..