Difference between revisions of "TTP229-B"
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Revision as of 19:04, 18 July 2017
Contents
Introduction
The TTP229 is a chip used for touch pads. Typically the TTP229 is used with 8 or 16 keys. Power requirements are 2.4V - 5.5V which makes them ideal to use with ESP Easy, the communication protocol is I2C so essentially only 4 cables are needed for up to 16 keys.
Hardware
1st-GPIO -> SCL on the module 2nd-GPIO -> SDA on the module (sometimes labeled SD0) 2.4-5.5V to module VCC GND to module GND
ESP Easy
Use the device tab on the ESP Easy web interface and create a new task by editing one of the available tasks. Select "Keypad - ..." from the drop down box.
The values that this device reports will be as follows:
Commands
| Button | Value | Extra information |
|---|---|---|
| 1 | 257 | If you want the buttons number instead of the logarithmic expansion you could use this formula [1,4427ln(%value%)-7,0056]. |
| 2 | 514 | |
| 3 | 1028 | |
| 4 | 2056 | |
| 5 | 4112 | |
| 6 | 8224 | |
| 7 | 16448 | |
| 8 | 32896 | |
| 9 | 65792 | |
| 10 | 131584 | |
| 11 | 263168 | |
| 12 | 526336 | |
| 13 | 1052672 | |
| 14 | 2105344 | |
| 15 | 4210688 | |
| 16 | 8421376 |
