Piezoelectric doorbell

Features
Product remote control, suitable for different use environment;
The piezoelectric power generation components were soaked in harsh salt water for 7 days and removed without corrosion and normal power generation.
The doorbell launch adopts anti-splashing design, which can also be used in heavy rain;
Doorbell music integration has a number of chord music, users can choose music;
The remote control adopts piezoelectric power generation mode, the press times reaches more than 600,000 times, and the power generation part has no attenuation;
Intelligent learning matching, convenient for users to flexibly add or subtract the matching operation;
Volume music power off memory function, one setting permanent storage, 58 chord music, 4 levels of volume adjustment;
Four ring modes are available: The ring indicator is blinking, the ring indicator is off, the ring indicator is blinking, the ring indicator is steady on.

Receiver technical parameters
Working voltage: AC110V-220V 60HZ
Standby power consumption: less than 1W
Receiving frequency: 433.92MHZ
Number of buttons: 2-4
58 chord music tracks, customized according to demand. The light pattern

Emitter technical parameters
Power supply: piezoelectric power generation
Press life: more than 600,000 times
Transmitted power: less than 10mW
Transmission frequency: 433.92Mhz
Communication mode: OOK
Number of buttons: 1
Use distance: open >150M, indoor 45m-70m

Installation method
The transmitter can be affixed with a double-sided adhesive tape that comes with delivery
When disassembling and installing the transmitter, do not touch the electronic components and do not turn the transmitter upside down
The receiver can be used by plugging it into a conventional indoor socket

Code operation instructions
Hardware: 1 status indicator, music IC, 2 keys (K1 default to switch music, K2 volume size
Pairing: long press the "doorbell mode" button for about 2 seconds, and the "beep" rings once to enter the pairing mode (at this time, let go and enter the learning mode). Press the transmit button three times continuously. If the pairing is successful, the LED at the receiving end will blink twice and "beep" twice to save the pairing information. To exit the pairing mode, press any key.

Qing code
Delete pairing: power off the device first, hold down the button of "doorbell mode", and the LED will start flashing and emit a "drop". After 5 seconds, three quick calls will indicate that the pairing is completed.
If the function modification of the new version is not known, please refer to the actual sample.