QuoteThe standard USB remote code is capable of very precise shutter release timing if you use the right sequence. With the switch mode set to "One Press" and "Sync" enabled, have your Arduino assert the 5V line prior to when you need to release the shutter and hold it high. When you want to shoot, set the 5V line to 0V. You should get a shot less than a few milliseconds later and that delay will be very consistent from shot to shot.I made many test with different interval between shots (2,3,4,5 sec) and different transition timing between 5 and 0V (100ms - 1 sec) but the range of the delays is always 100-300ms.
The standard USB remote code is capable of very precise shutter release timing if you use the right sequence. With the switch mode set to "One Press" and "Sync" enabled, have your Arduino assert the 5V line prior to when you need to release the shutter and hold it high. When you want to shoot, set the 5V line to 0V. You should get a shot less than a few milliseconds later and that delay will be very consistent from shot to shot.
The goal is to trigger the camera from the Arduino board and to know the exactly delay between the triggering and the shot. This because I need to log position, attitude, etc on the istant of the shot.My first attempt was with the standard remote functionality but after many test (all in manual mode, manual focus, no preview, etc) the delay is random in a range of 100-300 ms, too much for me.
My goal is to shot a picture exactly every 2 sec because i've to log on the Arduino parameters in synch with the pictures.I send to the USB, for example, this square wave: t0=5V t1=0V t2=0V with t0=0ms, t1=100ms and t2=3000ms but the camera shots every 3200ms, 2500ms, 3300ms...
1) Enable USB remote, one press switch mode, normal output mode, sync enabled2) Set the 5V signal high for at least 2 seconds (to allow focus & exposure setting)3) Release the 5V signal when you want to shoot.
--[[@title USBTest 130912--]]--MUST BE IN CONTINUOUS MODEnshot=1print("Holding shoot_full")print("Press <menu> to exit")press("shoot_full") -- continuous moderepeat wait_click(10) if(get_shot_ready())then print(nshot,get_shot_data(4)) -- shot #, interval from last shot nshot=nshot+1 enduntil is_key("menu")
think the t0 parameter may be wrong, but I'm not sure what the parameters mean on the Arduino. It looks like he's not holding 5 volts at all (0 ms) and he's holding 0 volts for 3.1 seconds. This would explain the problem.
At t1 there's the transition from 5V to 0V... so i had the 5V for 100ms and 0V for 2.900ms.
I tried to enable the synch and it works well! Now the shooting is costant.Unluckily I can't take more pictures than 1 every 2.5sec. Under this interval the camera don't recognize the transition of the USB and so it had to wait the next one (one shot mode and continous mode).
@waterwingzI tried to enable the synch and it works well! Now the shooting is costant.Unluckily I can't take more pictures than 1 every 2.5sec. Under this interval the camera don't recognize the transition of the USB and so it had to wait the next one (one shot mode and continous mode).
I'm not going to try to follow all of lapser's various posts on this subject - you are on your own there.
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