URM37 servo
Adam.Po 2025-10-31 21:29:45 72 Views3 Replies I bought URM37 v5.0 and I wont to control servo.
I send command RS232 0x22 0x12 … and on the servo output
I have only one pulse. To have more, I need to send command again.
but sending commad wich freq. 50HZ is impossible.
Is it possible to control servo in RS232 mode?
Instead of driving the servo from the URM37, connect the servo directly to your MCU (Arduino, ESP32, STM32, etc.) and use a PWM output to control it.
Let the URM37 only handle ultrasonic ranging via serial.
ahsrab.rifat I know, it is possible, but I have bought it to control it only via serial interface. That's why I bought this expensive one. I could have bought a cheaper one, e.g., the HC-SR04. Moreover, as I saw on the oscilloscope in PWM mode, the servo out frequency is 25Hz. My servo operates at a min of 50 Hz.
This circuit is a joke.
I forgot to mentioned that I use MG945 servo, it is typical, but it is not working below 50HZ (faster than 20ms)
Adam.Po 