Hi, I am currently trying to get the voltage of an connected Lipo, but I am struggeling. I am using mbed to read the voltages, and I can read fine from all pins, but when I try to read from P0_5, I just get some really low fluctuating values, and nothing correct. I have read the datasheed and bui…

Are you connecting the battery to the JST connector/LiPo pin or another pin? The; (analogRead(BATT) * 0.0011224) has been really easy for me to get a semi-accurate voltage off of Gen 3 hardware where I can then monitor and make sure the number doesn’t dip too low (signifying someone at the plant …

I have never worked in mbed, so I googled. To read Analog voltage mbed code appears to look like; #include "mbed.h" Serial pc(SERIAL_TX, SERIAL_RX); AnalogIn ain(A0); int main() { while(1) { wait(10); float f=ain.read(); pc.printf("value is: %d \n",f); } } So from that I would …

I can read analog voltage fine, just not from that pin strangely… but why multiply it with such a small number? f will give you a number between 0 and 1, so voltage will be between 0 and 0.0011224V?! or did you want to take the raw ADC value and multiply it?

From the Argon docs; “The constant 0.0011224 is based on the voltage divider circuit (R1 = 806K, R2 = 2M) that lowers the 3.6V LiPo battery output to a value that can be read by the ADC.” Again, apologies if none of this is transferable given my lack of mbed knowledge. But I send the battery volta…

Particle Xenon read battery with mbed

Troubleshooting

jonas.woerner May 14, 2019, 10:19am 3

Yes, I am using the JST connecotor.
I assume you are using arduino framework? maybe thats a difference… I dont get why it doesnt work with mbed though.

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Particle Xenon read battery with mbed

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