Difference between revisions of "TTP229-B"
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Revision as of 20:46, 18 July 2017
You may hear some construction noise in the background...
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
Please observe that you should NOT use default i2c pins since this will jam the i2c communication with the other i2c devices. This is because of the non-standard i2c protocol used by this module.
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 (8 key) | Value (16 key) | Extra information |
|---|---|---|---|
| 1 | 257 | 1 | |
| 2 | 514 | 2 | |
| 3 | 1028 | 4 | |
| 4 | 2056 | 8 | |
| 5 | 4112 | 16 | |
| 6 | 8224 | 32 | |
| 7 | 16448 | 64 | |
| 8 | 32896 | 128 | |
| 9 | - | 256 | |
| 10 | - | 512 | |
| 11 | - | 1024 | |
| 12 | - | 2048 | |
| 13 | - | 4096 | |
| 14 | - | 8192 | |
| 15 | - | 16384 | |
| 16 | - | 32768 |
