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Did you ever get around this?
I am looking at the PineTime that is also equiped with a nRF52832
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A story on Hackaday with regard to flashing Arduino on watches: https://hackaday.com/2019/08/23/ota-flash-tool-makes-fitness-tracker-hacking-more-accessible/
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You are probably correct about that... although, it can give some satisfaction if you solve an issue like this.
Thanks again!
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Oh, @Gordon do you happen to know which capacitor I should look at?
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Baudrate is set to 115200. I always do a power cycle after flashing, so that should qualify as a reset, correct?
Tonight I will try to power it from an external supply and see if I can connect.
Thank you for the hints @Gordon
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I am having a similar problem with a NodeMCU. I tried the line in (post 8) that helped the topic starter, but to no avail.
- Flashing seems to go fine (see bottom of this post)
- I can sometimes access the Espruino prompt in Putty (1 out of 3 or 4 tries)
- I never see a prompt in Espruino
When I click the connect button in Espruino and choose the COM port, then I see the following in the IDE:
- an orange box with text "Disconnected"
- a line with some garbage text "0 űÁ"
- a red box with text "Unable to retrieve board information. Connection error?"
- a green box with text "Connected to CO4 (no response from board)"
Here is my line that I use for flashing:
esptool.py.exe --port COM4 --baud 115200 write_flash --flash_size=detect -fm dio 0 .\espruino_1v99_esp8266_4mb_combined_4096.binAnd here are the flash results:
esptool.py v2.5.1 Serial port COM4 Connecting.... Detecting chip type... ESP8266 Chip is ESP8266EX Features: WiFi MAC: 18:fe:34:e1:a4:16 Uploading stub... Running stub... Stub running... Configuring flash size... Auto-detected Flash size: 4MB Flash params set to 0x0240 Compressed 4194304 bytes to 353773... Wrote 4194304 bytes (353773 compressed) at 0x00000000 in 31.7 seconds (effective 1058.0 kbit/s)... Hash of data verified. Leaving... Hard resetting via RTS pin...I can upload any Arduino sketch that I have to this module (NodeMCU from Amica), and they all work as expected. So, I think the module is fine. I don't have any others to try right now.
Any help is appreciated
- Flashing seems to go fine (see bottom of this post)
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When I get this error in the IDE, connecting with Putty results in an: Putty Fatal Error: Error reading from serial device.
In the putty dialog I see this:
ets Jun 8 2016 00:22:57
rst:0x1 (POWERON_RESET),boot:0x13 (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:2
load:0x3fff0018,len:4
load:0x3fff001c,len:2364
load:0x40078000,len:0
load:0x40078000,len:10880
entry 0x40078c4c -
I tested the following:
- Start Espruino IDE
- Connect ESP32
- Connect to COM port (which worked)
- Close the IDE
- Start the IDE
- Connect to COM port (I get the "Connected to COM7 (No response from board)" message)
- Start Espruino IDE
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I am not yet sure how long a while is. I connected the ESP32 probably on Thursday and left the IDE open, computer was powered on at all times. When I wanted to connect the IDE to the port yesterday (Tuesday) evening (around 8 pm) I got the messages.
I disconnected and reconnected the device yesterday and was able to connect through the IDE. This morning I found that my computer had rebooted. I tried to connect again from the IDE and saw the same messages. It seems that only a power cycle of the ESP32 allows me to connect successfully.
I will keep an eye on this and report back when I have more information.
Thank you @Wilberforce
Gadget freak