// other
ACS712
Hall-effect AC/DC current sensor
€2.50
avg eur
Analog
Pins
3
Specs
4
Libraries
1
Protocols
1
// wiring → esp32 devkit v1
3V3
EN
GPIO36
VP
GPIO39
VN
OUT
GPIO34
GPIO35
GPIO32
GPIO33
GPIO25
GPIO26
GPIO27
GPIO14
GPIO12
GND
GND
GPIO13
ESP32
WROOM-32
devkit v1
USB
VIN
5V
VCC
GND
GPIO23
GPIO22
SCL
GPIO1
TX0
GPIO3
RX0
GPIO21
SDA
GPIO19
MISO
GPIO18
SCK
GPIO5
SS
GPIO17
TX2
GPIO16
RX2
GPIO4
GPIO2
GPIO15
sensor pin (left)
sensor pin (right)
unused
// pinout → esp32
| Sensor Pin | ESP32 Connection |
|---|---|
| VCC | 5V (VIN) |
| GND | GND |
| OUT | GPIO 34 (via divider) |
// technical specs
Variants
5A / 20A / 30A
Sensitivity
185/100/66 mV/A
Voltage
5V
Output
VCC/2 ± reading
// github libraries
// notes & warnings
OUT is 0–5V — divide to 3.3V. Centered at VCC/2 (idle). Noisy at low currents (<200mA).
// related sensors · other
ADS1115
16-bit I2C ADC, 4 channels
€2.50
Capacitive Soil Moisture v1.2
Capacitive plant moisture probe
€2.00
HX711 + Load Cell
24-bit ADC for load cells (weight)
€2.00
INA219
DC current + voltage monitor
€2.50
INMP441
I2S MEMS digital microphone
€3.00
KY-040 Rotary Encoder
Incremental rotary encoder w/ push button
€1.20
Submitted by caio.ricciuti@outlook.com
· Apr 26, 2026