perf: reworked sleep logic

README.md

@@ -1,11 +1,33 @@
-# Touch pad on ATMega 8/48/168/328 + nRF24L01
+# AVR firmware for wireless touch pad (nRF24L01+)
 
 ## Features
 
-1. Power consumption in the sleep mode approximately 2 μA.
-2. When triggered transmits battery level charge.
-3. Easy installation into any standard touch pad enclosure.
+1. Wireless touch pad sensor for ATMega 168/328 microcontrollers with nRF24L01+ transceiver.
+2. Power consumption in the sleep mode approximately 2 uA.
+3. Transmits device identifier and battery voltage level on each touch event.
+4. Battery measurement through internal ADC with 1.1 V bandgap reference.
+5. Wake-up from power-down mode by external interrupt on falling edge.
+6. Supports ATMega168, ATMega168P, ATMega168PB, ATMega328, ATMega328P, ATMega328PB.
+7. Easy installation into any standard touch pad enclosure.
 
-## Note
+## Attention
 
-A gateway is required. For details see [RF Gateway](http://git.zh.com.ru/alexey.zholtikov/RF-Gateway).
+1. A compatible RF Gateway is required to receive and process transmitted packets.
+2. After power-on reset the first touch event may not trigger a transmission.
+3. Multi-touch is not supported, only a single touch event per transmission cycle.
+4. Changing gateway address or channel requires reflashing the microcontroller.
+
+## Using
+
+In an existing PlatformIO project, run the following command to install the firmware:
+
+```bash
+cd your_project
+git clone https://github.com/aZholtikov/zh_avr_touch_pad
+```
+
+In the `platformio.ini`, select the target microcontroller environment and upload:
+
+```bash
+pio run -e ATmega328P -t upload
+```