Why my messages are not working

Questions
1 
function init(self)
    msg.post("ground/controller#script", "set_speed", { speed = self.speed })
end
function on_message(self, message_id, message, sender)
	if message_id == hash("stop") then
		msg.post("ground/controller#script", "set_speed", { speed = message.speed })
	end
end

It is my controller script. When my hero eats the obkect with the script below< my ground should stop(it’s speed has to be 0), but it is not working

	self.speed = - 300
end	
function update(self, dt)
    local pos = go.get_position()
    pos.x = pos.x + self.speed * dt
    go.set_position(pos)
    if pos.x == -32 then
    	go.delete()
    end
end
function on_message(self, message_id, message, sender)
	if message_id == hash("contact_point_response") then
		if message.group == hash('hero') then
			msg.post("level/controller#script", "stop")
			go.delete()
		end
	end
end
2

Could you please describe this a bit more? I’m having a hard time following what is supposed to happen. Some comments:

In the init() function you call msg.post("ground/controller#script", "set_speed", { speed = self.speed }). This looks fine I think.

But in on_message() when you handle the “stop” message you call msg.post("ground/controller#script", "set_speed", { speed = message.speed }) with speed set to message.speed, but when you post the stop message (msg.post("level/controller#script", "stop")) you don’t include any speed in the message.

3

I fixed it< but it’s not working. I made controller for control such things as speed and death of the hero for resetting the game. Such thing was used in the first tutorial.

4

So it’s working now? Or is it still broken? Can you please post the relevant scripts so we can take a look?