When the Wire.requestFrom() returns, the I2C transaction has completely finished and the received data is in the receive buffer of the Wire library. The Wire.read() only reads the data from that buffer.

The waiting with the delay is not needed.

Hello,
From the manual page 29 https://www.ti.com/lit/ug/sluuac9a/sluuac9a.pdf?ts=1594252976133&ref_url=https%253A%252F%252Fwww.google.com%252F I see that power is under Subclass 68, and hibernate I and V can be read from offset 7 and 9. Now in the example BQ27441_Basic, power data is got by calling the function power() which is as following:

int16_t BQ27441::power(void) { return (int16_t) readWord(BQ27441_COMMAND_AVG_POWER); }

The readword() and i2cReadBytes() functions are as following:

uint16_t BQ27441::readWord(uint16_t subAddress)
{
	uint8_t data[2];
	i2cReadBytes(subAddress, data, 2);
	return ((uint16_t) data[1] << 8) | data[0];
}

int16_t BQ27441::i2cReadBytes(uint8_t subAddress, uint8_t * dest, uint8_t count)
{
	int16_t timeout = BQ72441_I2C_TIMEOUT;	
	Wire.beginTransmission(_deviceAddress);
	Wire.write(subAddress);
	Wire.endTransmission(true);
	
	Wire.requestFrom(_deviceAddress, count);
	
	for (int i=0; i<count; i++)
	{
		dest[i] = Wire.read();
	}
	
	return timeout;
}

My questions are:

1. The power() function is reading 2 bytes so which 2 bytes it is reading (Hibernate I at offset 7 or Hibernate V at offset 9)?

2. In the BQ27441_Basic.ino how can, it is reporting power in mW just by reading Hibernate I or Hibernate V?
   int power = lipo.power(); // Read average power draw (mW)

3. If I want to see both the Hibernate I at offset 7 and Hibernate V at offset 9, how should I modify the library to print the individual data of Hibernate I at offset 7 and Hibernate V at offset 9 and also the power?

Please correct me if I am wrong. Thanks for your time.

By using and adapting the BQ27441_GPOUT_BAT_LOW example, there seems to be a problem with setSOC1Thresholds(SOCI_SET, SOCI_CLR).

Whatever will be defined as const byte SOCI_SET (as well as const byte SOCI_CLR), the BQ27441 stay always to use and report with BQ27441::SOC1SetThreshold(void) a threshold value of 60%.

Any idea what's wrong there?

Thanks a lot in advance!

Hi there!
I arize the problem again.
This problem still exists in both libraris:
SparkFun_BQ27441_Arduino_Library
and
Battery_Babysitter
To reproduce, just run BQ27441_GPOUT_BAT_LOW.ino
You'll see that SOC1SetThreshold() funtion allways return 64(0x40).

I observe this on three bq27441 chips.

My uC ATSAMD51 in WIO Terminal.

How does bq27441 learning cycle process do?

Hello,
How can I read the data of the R_a RAM subclass (Page 48 of the reference manual https://www.ti.com/lit/ug/sluuac9a/sluuac9a.pdf?ts=1594253708333&ref_url=https%253A%252F%252Fwww.google.com%252F?

I want to read all the 15 values in that subclass where each offset is 2 bytes.

Thanks a lot!

hello
Thank for this Drivers.
battery of 2600Mah 3.6V

with the basic example , I see the voltage decrease according to my mesurement
but the state-of-charge (%) stay at 100 %

do you have an idea Why iy=t is stay at 100% please ?

thank you

In the BQ27441_Extended_Configuration example lipo.setCapacity(BATTERY_CAPACITY) command executed
AFTER entering config mode(lipo.enterConfig()),
while in the BQ27441_Basic example it executed WITHOUT entering config mode.
Is it correct?

On Arduino library manager this library is named "SparkFun BQ72441 LiPo Fuel Gauge Arduino Library"
instead of "SparkFun BQ27441 LiPo Fuel Gauge Arduino Library" a little typo issue

on this line:
while ((timeout--) && (!(status() & BQ27441_FLAG_CFGUPMODE)))

status() should be replaced with flags()

correct line:
while ((timeout--) && (!(flags() & BQ27441_FLAG_CFGUPMODE)))

please fix,
thanks.