according to my previous question about Power Supply Voltage monitoring:
I have been monitoring voltage via JSON RPC but I cannot obtain value for modem SLM750.
From CLI when I use: gsmctl -A AT+QADC=0
the result is: ERROR
Second thing are result differences for routers RUT230 and RUT240.
For RUT240 (modem EC25) with the correction 0,4V results are quite proper except modem SLM750 (#ERROR)
But for RUT230 (with modem UC20) results obtained by equation are way to low.
I have values in range 8,5 - 8,75V where there is constant voltage by PSU 12V.
Do you have proper equation that could be apply for each modem type?
Is there possibility to monitor power supply for modem SLM750?