2019-04-27, 08:31 AM
Hi festeraeb,
i made a voltage and current monitor based on a Microchip PAC1710 some years ago.
I used the Bluegiga BLE113 module running a basic script every second. It measures the
current with 1 mA accuracy and sums up the battery capacity.
The voltage measurement is laser trimmed inside the chip. Accuracy 10mV and 0.15 % typically.
Voltage range is 0 to 40 V. Current range is 10 A continously, 20 A peak.
My basic script keeps the actual capacity and saves it to a ring buffer every day. So you
can review the last 14 days. The advantage is that the BT module draws less than 1 mA from the
battery and is summing up the current every second. So you can keep it running all the time.
I have set up node red to receive the BT advertisement messages. It should not be a problem
to change the basic script to send out the data using advertisement. So you don´t need a
connection between the module and the Raspberry.
I need to grab a little but I guess I have some pcbs left.
Chris
i made a voltage and current monitor based on a Microchip PAC1710 some years ago.
I used the Bluegiga BLE113 module running a basic script every second. It measures the
current with 1 mA accuracy and sums up the battery capacity.
The voltage measurement is laser trimmed inside the chip. Accuracy 10mV and 0.15 % typically.
Voltage range is 0 to 40 V. Current range is 10 A continously, 20 A peak.
My basic script keeps the actual capacity and saves it to a ring buffer every day. So you
can review the last 14 days. The advantage is that the BT module draws less than 1 mA from the
battery and is summing up the current every second. So you can keep it running all the time.
I have set up node red to receive the BT advertisement messages. It should not be a problem
to change the basic script to send out the data using advertisement. So you don´t need a
connection between the module and the Raspberry.
I need to grab a little but I guess I have some pcbs left.
Chris