How to connect servos to pixhawk 2.4.8

okotik · May 11, 2020, 10:12am

Hello. I want connect servo and relay to pixhawk 2.4.8. I use 4.0.3 firmware. I try this https://ardupilot.org/copter/docs/common-gripper-servo.html
But I did not find [GRIP_ENABLE] function.

dkemxr · May 11, 2020, 1:55pm

You do not see the parameter here?

If not post a screen shot of the messages screen right after connection like this.

okotik · May 11, 2020, 2:23pm

I did as described in the link and everything work good.

dkemxr · May 11, 2020, 4:48pm

So your problem is solved?

okotik · May 12, 2020, 6:29am

Yes. But now I have a problem with relay in aux5

dkemxr · May 12, 2020, 1:04pm

Is BWD_PWM_COUNT set to 4? (enabling GPIO on AUX 5&6)
RCx_OPTION set to 28? (RC input channel of choice controlling Relay 1
RELAY_PIN set to 54? (Relay 1 output on Aux 5)

okotik · May 13, 2020, 3:58pm

BRD_PWM_COUNT set to 4? - yes
RCx_OPTION set to 28? - yes
RELAY_PIN set to 54? yes

I set relay to chanel 8

dkemxr · May 13, 2020, 4:57pm

So is it working or not? Post your parameter file if it isn’t.

okotik · May 14, 2020, 6:23am

Hello. No it do not work. This is my parametr filearducopter.param (17.4 KB)

okotik · May 14, 2020, 6:24am

Hello. No it do not work. This is my parametr file

arducopter.param (17.4 KB)

dkemxr · May 14, 2020, 12:54pm

You have the RPM_PIN set to 54 (AUX5) also. But even with this setting the configuration works fine for me. Chan8 goes high, 3.3V output on Aux 5.

okotik · May 14, 2020, 1:27pm

Yes. Signal coming but i can not command this signal

dkemxr · May 14, 2020, 1:36pm

Is Chan8in changing PWM values? >1800 for Relay on? I have the same configuration as you have on the bench and control from a chan8 switch toggles the relay on/off. It’s a Pixhawk 2.4.8 also.

okotik · May 14, 2020, 2:21pm

Yes. What relay do you use?

dkemxr · May 14, 2020, 2:39pm

As I said the same one you configured for. Here is the parameter file if you want to compare it to yours.

Relay.param (18.4 KB)