Error in Data forwarder

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#1

Hi !
I get this error when I want to use the data forwarder :

[SER] Connecting to /dev/ttyUSB0
(node:28844) UnhandledPromiseRejectionWarning: Error: Could not read serial number for device
    at getDeviceId (/usr/lib/node_modules/edge-impulse-cli/build/cli/data-forwarder.js:509:15)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at async connectLogic (/usr/lib/node_modules/edge-impulse-cli/build/cli/data-forwarder.js:94:24)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:28844) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:28844) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

I use a NodeMCU to record my voice, here the code :

const int picMic = A0;
void setup(void)
{
Serial.begin(115200);

delay(1000);
Serial.println(“Start”);
}
void loop(void)
{
Serial.println(analogRead(picMic));
}

What can I do to solve this problem ?
Thank you !

#2

@forstark interesting error message, I’ve not seen that before. Could you post the output of lsusb ?

Note that the data forwarder typically is not fast enough to capture audio correctly (you get limited throughput), but I’d love to see what you can pull out of it.

#3

Thanks for your message !
Here, the output of lsusb :

Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 04f2:b685 Chicony Electronics Co., Ltd Chicony USB2.0 Camera
Bus 001 Device 006: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter
Bus 001 Device 005: ID 8087:0029 Intel Corp.
Bus 001 Device 004: ID 06cb:00a8 Synaptics, Inc.
Bus 001 Device 002: ID 1ea7:0064 SHARKOON Technologies GmbH 2.4G Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

If it works I will publish a full description of my project on Instructable :slight_smile:

#4

@forstark, hmm… Bus 001 Device 006: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter sounds like the one you want and that has an ID. What is the output of ls -l /dev/serial/by-id?

It looks like this for me:

$ ls -l /dev/serial/by-id
total 0
lrwxrwxrwx 1 root root 13 Feb 16 02:03 usb-STMicroelectronics_STM32_STLink_066EFF323338424E43141326-if02 -> ../../ttyACM0

I wonder if it finds the wrong device.

Anyway, as a workaround I’ve pushed v1.12.2 of the CLI (npm update -g edge-impulse-cli) which bypasses this error, and defaults to MAC address 000000000000 if it cannot read the ID. Let me know if that works on your end!

#5

I get this output :

total 0
lrwxrwxrwx 1 root root 13 févr. 16 13:45 usb-1a86_USB2.0-Serial-if00-port0 -> …/…/ttyUSB0

I use a NodeMCU v3 board by the way.

I just updated the edge-impluse-cli, it works now ! thank you !

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#6

Moreover, I just want to tell you that if you select a baud rate higher than 115200 on the board, the data forwarder crashes when he tries to detect the data frequency.

#7

@forestark you’ll also have to set a higher baud rate when starting the data forwarder via:

$ edge-impulse-data-forwarder --baud-rate XXX
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