INA226
Also known as: INA226 · INA3221 · Power & energy
The INA219 for grown-up projects: better resolution, 36 V headroom for solar strings and battery banks, same two-wire simplicity.
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At a glance
⚑ flag an error| Measures | voltage, current, power |
|---|---|
| Accuracy | Higher-accuracy INA219 successor; 36 V bus |
| Interface | I2C @ 0x40–0x4F |
| Supply | 3.3–5 V |
| Battery-viable | Yes (deep-sleep friendly) |
| ESPHome | Native ESPHome component — ina226 |
| Typical price | $2-4 (street, varies) |
Compare all sensor modules in one table →
Clone check
Medium clone risk. Sibling INA3221 3-channel boards often strap all channels to ONE shunt — verify before trusting per-channel numbers.
Good for
Gotchas to know
- Shunt quality still sets your accuracy — calibrate.
- See clone risk if you buy the 3-channel INA3221 variant.
Wiring it up
It's I2C, so it shares two pins with every other I2C sensor you own — chain your climate/light/CO2 stack on one bus and mind the address clashes (this one lives at 0x40–0x4F). Any ESP32 dev board works.