TTP229-B

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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	Extra information
1	257	If you want the buttons number instead of the logarithmic expansion you could use this formula [1,4427*ln(%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