I already followed the steps listed in this answer: Connecting Raspberry Pi3 to L9110S H-Bridge

But it seems I must be doing something wrong because it still doesn't work.

I have a 12V battery 4800mAh (http://es.aliexpress.com/item/Free-Ship-Lipo-Battery-Portable-4800mAh-DC-12V-12-6V-Super-Rechargeable-Pack-EU-US-plug/32584864714.html?spm=2114.13010608.0.93.A2l9Zd)

These 12V motors: http://es.aliexpress.com/item/ROT-1-New-tracked-vehicle-chassis-metal-buggy-robot-tanks-video-show/32278263918.html?spm=2114.13010608.0.61.A2l9Zd

And this H bridge: http://es.aliexpress.com/item/Smart-Electronics-5Pcs-lot-L9110S-DC-Stepper-Motor-Driver-Board-H-Bridge-best-prices/32512498164.html?spm=2114.13010608.0.69.DbnLzz

I connected the battery to the H bridge using a power jack, then the battery to the raspberry pi ground, then the h bridge to the raspberry gpio ports and the H bridge to the motors.

I'm using GPIO 23 and 24, using the gpio command line utility, but nothing works.

Any ideas?

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  • Are you using Broadcom GPIO numbers or pin numbers or wiringPi numbers? By default I think the gpio utility uses wiringPi numbers. – joan Jul 7 '16 at 15:17
  • @joan Yes, wiring Pi – rubentd Jul 7 '16 at 16:21
  • wPi 23 is pin 33 (GPIO13). wPi 24 is pin 35 (GPIO19). Are they the GPIO you have connected to your motor driver board? – joan Jul 7 '16 at 16:45
  • @joan Yes. I'm using these two: i.imgur.com/tTUtaYu.jpg – rubentd Jul 7 '16 at 17:01
  • What commands are you using to set the GPIO as OUTPUTs and to set one high and the other low? – joan Jul 7 '16 at 17:20

I fixed it. The problem was: I was connecting the raspberry ground pin to the power jack ground pin. I connected it instead to the ground pin of the H bridge. It works now. Thanks everybody

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