README-ENG.md

DoorBell-v1 (ESP-01 S)

C/C++ application aimed at IOT.

• README PT-BR

Type of use:

• Emergency button;
• Bell;
• Others

Material

• Device: ESP-01S
• Battery: 902030 Li Ion - 550mah - 3.7v
• Charge controller: TP4056 (18650)
• 1A cell phone charger (Higher amperage may damage the battery and/or charge controller)
• Button (Push Button Key); I used these for the campaign

Adjustment in the project

• Rename the file define_exemplo.h to define.h and rename the constants with the credentials of your mqtt server and wifi.

Operation:

Device remains in "deep sleep" until the reset button is pressed. The device "wakes up", sends a message to the mqtt server and returns to the "deep sleep" state.

In my use, I added a 902030 Li Ion battery - 550mah - 3.7v.

To charge the battery, I added the TP4056 (18650) charge controller to the project; * Use a 1A charger to avoid damaging the charger or the battery.

Message Pattern

I chose to use the Json standard to send messages to the mqtt server built into Node-Red.
Using Json, I can do several actions using the json string.

Examples

• Save event to mongo DB
• Send message to telegram
• Send message to WhatsApp

With the message data in json, it can be processed by device, and trigger actions for different recipients according to the device identification.

• JSON example

• Node-Red (NODES)

• Sketch