ServoBlaster not working on Raspberry Pi Zero W

[ileamihai]

Hi Guys,

I am struggling with a pan/tilt project on a RPI Zero W.

I am following Allan H's Robot Project from here: https://www.youtube.com/watch?v=wzOkuglA_5s

ServoBlaster was installed as follows:

• git clone https://github.com/richardghirst/PiBits.git
• cd /PitBits/ServoBlaster/user
• changed the servod.c file in order to fix the hardware issue from here. maxjp's post from 22 March.
• sudo make servod
• sudo make install
• sudo ./servod
• echo P1-12=120 > /dev/servoblaster (NOT working -> PAN servo on pin 12)
• echo P1-16=70 > /dev/servoblaster (NOT working -> TILT servo on pin 16)

I've been scouring the Internet for a solution but cannot find anything...

Everything is up-to-date as of today (RPI-update, update, upgrade).

Thanks a lot for your feedback!

[githubpac]

I had the same issue and fixed it with 2 atempts to edit servod.c to change the Board Model to either 1 or 2. Edit line 960 per Maxjp response on #62. I first added || strstr(modelstr, "BCM2835") to the "else if " line to force a Board Model 1, but that didn't work so I removed and added it to if line just above and Made it a Board Model 2

[ileamihai]

Not working... changed the lines as you said, recompiled, reboot, still no movement... and its not a wiring issue (checked that).
Maybe I need to try a clean install...

[tambechristian]

Hi ileamihai. I have the same issue and I'm also following Allan H project but with Raspberry Pi W zero, but the pan-tilt camera is not responding to the servoblaster.
Has anyone figured this out?
Thanks

[priema]

I also have the same problem. :(
Does anyone already know how to fix it?

I edited the servod.c line#960, added the BCM2835 link in #62 described but it still does not working

i'm running on the latest noobs with Linux raspberrypi 4.9.28+ #998 Mon May 15 16:50:35 BST 2017 armv6l GNU/Linux

[DarthToker]

same here

[neutralvibes]

Unfortunately I have spent considerable time trying various things, including the fix mentioned above & downgrading the firmware, with no results. It appears it may require an older version of the OS, which isn't really a long term solution. I hope some great servoblaster guru can help to dull the pain a
growing numbers of users are feeling, at not being able to use such a great utility.

:(

[MarkR42]

I think that probably Servoblaster has had its time. Now Pigpio is much better supported (e.g. on newer OS and chip versions) and supports a superset of the functionality, these users are probably advised to use Pigpio instead.

[NewtownGal]

If no one can figure out how to make the beloved Servoblaster work on Pi-Zero, can someone tell us how to configure Pigpio to act as a drop-in replacement for Servoblaster ? Also, can Pigpio give 2 uS resolution like Servoblaster ?

[richardghirst]

Sorry I've been ignoring you for so long... had a lot of real life to deal with lately. I've just made this edit to servod.c and it seems to be working for me on a Pi Zero: diff --git a/ServoBlaster/user/servod.c b/ServoBlaster/user/servod.c index 341776c..f0c0e74 100644 --- a/ServoBlaster/user/servod.c +++ b/ServoBlaster/user/servod.c @@ -959,6 +959,8 @@ get_model_and_revision(void) board_model = 1; else if (strstr(modelstr, "BCM2709")) board_model = 2; + else if (strstr(modelstr, "BCM2835")) + board_model = 1; else fatal("servod: Cannot parse the hardware name string\n"); At least, after "echo 0=50 > /dev/servoblaster" a scope on P1-7 shows a regular 500us pulse every 20ms, as expected. I don't actually have it wired to a servo yet. Please let me know if that helps you guys. Richard

…

On Sun, Aug 20, 2017 at 12:43 PM, NewtownGal ***@***.***> wrote: If no one can figure out how to make the beloved Servoblaster work on Pi-Zero, can someone tell us how to configure Pigpio to act as a drop-in replacement for Servoblaster ? Also, can Pigpio give 2 uS resolution like Servoblaster ? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#84 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABvYsSYTHxERBC_nk1MQPwh_3S-muHoaks5saBvhgaJpZM4NE_pt> .

[tambechristian]

It works Richard ! I just tested in on a Pi Zero W with two servos. Thank you !!
My problem was that I didn't change "board_model = 2" into "board_model = 1"

[salmanarnab]

hello, i tried on raspberry pi model 3B. my servo is not responding. can anyone give me any suggestion??

[rahul-moorkoth]

Hey I am also having same problem with raspberry pi 3 Model B. If anyone found solution then please post it. Thanks

[srcshelton]

Hi all, I've not had the chance to test on RPiZ hardware, but could you try the fork at https://github.com/srcshelton/servoblaster (specifically the change at See changes at srcshelton@4f42f39#diff-364476f388d8ca6306a119734df9fe60R1025) and confirm whether this is also effective on the Zero (which I believe it should be!)

[richardghirst]

Relevant fixes for PI Zero and Pi3 copied from from Stuart's version to this repo. Closing.