NodeJS driver for the Pan-Tilt HAT from Pimoroni and the Pan-Tilt HAT from Waveshare. COMING SOON - support for the Pan-Tilt Platform B0283 from Arducam 100% Javascript. No need for any external Python libraries.
There are two makes of Pan-Tilt HAT board for the Raspberry Pi that sit on top of the Pi, one made by Pimoroni in the UK and one made by Waveshare in China. There is also a Pan-Tilt platform designed for the Pi and the Jetson Nano made by Arducam that can sit alongside the Pi with 4 jumper wires back to the Pi. (DRIVER SUPPORT COMING SOON) All boards have some similarities and some differences
| Feature | Pimoroni | Waveshare | Arducam (Under Development) |
|---|---|---|---|
| Designed for the Raspberry Pi | Yes | Yes | Yes |
| Servo Type | Tower Pro SG90 | Waveshare WS-SG90 | PES GH-S37D digital servo |
| Control Chip | PIC16F1503 with custom firmware on the i2c bus. PIC generates the PWM signals | Standard PCA9685 PWM/LED controller on the i2c bus | Standard PCA9685 PWM/LED controller on the i2c bus |
| I2C address | 0x15 | 0x40 (with ability to be changed) | TBC |
| Extra feature | Has a 3rd output for PWM controlled LEDs and Lights and NeoPixels (this driver does not control the LED/Lights) | Has a Light Sensor on the i2c bus (this driver does not read the light level sensor) | None |
| Extra features | Brings the I2C, UART, Broadcom PWM and SPI signals to the edge of the board | Has tall header pins to allow access to all 40 Pi pins. Has solder pads to allow the i2c address to be changed | Can sit to the side of the Pi (does not need to go on top) Uses jumper wires to connect to a Pi's i2c bus |
| Pi HAT Standard Compliance | Yes, has the HAT EEPROM. The Pi device tree will show the Pimoroni Pan-Tilt HAT is connected | No. Does not implement the HAT identification EEPROM | N/A. Not a HAT |
| Country of origin | UK | China | |
| URLs | http://shop.pimoroni.com/products/pan-tilt-hat | http://www.waveshare.com/pan-tilt-hat.htm | https://www.arducam.com/product/arducam-pan-tilt-platform-for-raspberry-pi-camera-2-dof-bracket-kit-with-digital-servos-and-ptz-control-broad-b0283/ |
var PanTiltHAT = require('pan-tilt-hat');
var pan_tilt = new PanTiltHAT();
console.log('Goto position Pan 0, Tilt 0');
pan_tilt.pan(0);
pan_tilt.tilt(0);
The library autodetects the Pan/Tilt boards by checking the I2C addresses (0x15 and 0x40)
- Pan=0, Tilt=0 has the camera looking forword.
- Pan of +90 makes the Pi Camera look to the left
- Pan of -90 makes the Pi Camera look to the right
- Tilt of -80 makes the Pi Cammera look up
- Tilt of +80 makes the Pi Cammera look down
- (The positive and negative directions are the same as the Pimoroni Python driver)
pan(angle) // angle between -90 and 90
servo_one(angle) // angle between -90 and 90
tilt(angle) // angle between -80 and 80
servo_two(angle) // angle between -80 and 80
The camera will start to turn at the specificated speed and continue to turn until told to stop
pan_left(speed) // start moving with a speed from 0 to 15. 0 means stop
pan_right(speed) // start moving with a speed from 0 to 15. 0 means stop
tilt_up(speed) // start moving with a speed from 0 to 15. 0 means stop
tilt_down(speed) // start moving with a speed from 0 to 15. 0 means stop
stop() // stop the pan and the tilt
close() // closes the class and frees resources
After 2 seconds the servo PWM drive signal on the Pimoroni board is turned off to save power. This has not been implemented on the Waveshare or Arducam board yet