No telemetry transmission

[mariusz1602]

In RAW DATA and Overview - no telemetry data.

In RaspberryPi it only displays:

pi@raspberrypi:~ $ cd client
pi@raspberrypi:/client $ source ./.venv/bin/activate
(04_iot_central) pi@raspberrypi:/client $ python raspberry_pi_client.py
Press Q to quit
Sending reported property: {'remaining_disk_space': '19G'}

Errors are displayed when the program is interrupted by Q.

Press Q to quit
q
Quitting...
Traceback (most recent call last):
File "/home/pi/client/raspberry_pi_client.py", line 296, in
asyncio.run(main())
File "/usr/lib/python3.9/asyncio/runners.py", line 44, in run
return loop.run_until_complete(main)
File "/usr/lib/python3.9/asyncio/base_events.py", line 642, in run_until_complete
return future.result()
File "/home/pi/client/raspberry_pi_clie

nt.py", line 288, in main
await asyncio.gather(telemetry_loop, reported_loop)
File "/home/pi/client/raspberry_pi_client.py", line 161, in send_telemetry
payload = f'{{"cpu_temp": {get_current_cpu_temp()}, "cpu_freq": {get_cpu_frequency_statistics()["current"]}, "cpu_usage": {get_cpu_usage()}, "ram_usage": {get_memory_statistics()["used"]}}}'
File "/home/pi/client/raspberry_pi_client.py", line 91, in get_cpu_usage
return float(cpu_usage)
ValueError: could not convert string to float: ''
Task was destroyed but it is pending!

Please, can you tell me where this error came from ?
"line 91, in get_cpu_usage
return float(cpu_usage)**
ValueError: could not convert string to float: ''"

About, Commands - works ok.

[mariusz1602]

That was a problem:
#get CPU usage
def get_cpu_usage():
cpu_usage = str(os.popen("top -n1 | awk '/Cpu(s):/ {print $2}'").readline().strip())
return float(cpu_usage)

When I commented on this, the telemetry transmission works. so something wrong in the definition of reading CPU.

[mariusz1602]

This work:
def get_cpu_usage():
cpu_usage = str(os.popen("top -n1 | awk '/%CPU:/ {print $3 + $5}' | tr ',' '.'").readline().strip())
return float(cpu_usage)