ACS71020

This library is heavily inspired from SparkFun_ACS37800_Power_Monitor_Arduino_Library

It is a minimal and readapted version.

• unlock() -> Unlocks the device, necessary to write to EPROM.
• readRegister(uint8_t address, uint32_t &data) -> Reads 32 bits of data from register through I2C.
• writeRegister(uint8_t address, uint32_t data) -> Writes 32 bits to specified registry using I2C bus.
• readRMS(float &voltage, float &current) -> Reads the voltage (V) and current (A) RMS values from registry 0x20.
• readRMSAvgSec(float &voltage_avg_sec, float &current_avg_sec) -> Reads voltage (V) and current (I) RMS average values over the last second (register 0x26).
• readPowerActive(float &pActive) -> Reads active power (W) from registry 0x21.
• readPowerActiveAvgSec(float &pActive_avg_sec) -> Reads active power (W) average value over the last second.
• readPowerApparent(float &pApparent) -> Reads apparent power (VA) from registry 0x22.
• readPowerReactive(float &pReactive) -> Reads reactive power (VAR) from registry 0x23.
• readPowerFactor(float &pFactor) -> Reads power factor from registry 0x24.

ACS71020 default settings

0x0B (0x11E0F) qvo_fine: 15 sns_fine: 143 crs_sns: 0 iavgselen: 0

0x0C (0x0) rms_avg_1: 0 rms_avg_2: 0

0x0D (0x1FE000) pacc_trim: 0 ichan_del_en: 0 chan_del_sel: 16 fault: 255 fitdly: 0 halfcycle_en: 0 squarewave_en: 0

vevent_cycs: 0 vadc_rate_set: 0 overvreg: 0 undervreg: 0 delaycnt_sel: 0

Chips settings

Code	0x0B	0x0C	0x0D
2239096K	0x22EC0F	0x1F40040	0x3FFFF81