Aj Sr04m Datasheet <2026>

delay(60);

AJ-SR04M is the best all-rounder for outdoor/wet applications needing short-range detection (2 cm blind zone). JSN-SR04T has longer range but larger blind zone (20 cm). HC-SR04 is indoor only. 10. Application Circuit & Code Examples 10.1 Arduino (Standard) #define TRIG 9 #define ECHO 10 void setup() Serial.begin(9600); pinMode(TRIG, OUTPUT); pinMode(ECHO, INPUT); aj sr04m datasheet

Some versions have a 5th pin (EN – Enable), but standard 4-pin is most common. If present, tie EN to VCC to enable. Wiring Example (Arduino): AJ-SR04M → Arduino Uno VCC → 5V Trig → Digital Pin 9 Echo → Digital Pin 10 GND → GND 3. Theory of Operation & Timing Diagram The AJ-SR04M uses the same timing protocol as HC-SR04, but with improved signal conditioning for longer cable runs. delay(60); AJ-SR04M is the best all-rounder for outdoor/wet