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- Mailbox Sensor - "Code examples are provided"
- Motion Sensor
- Door Window Sensor
The Mailbox Guard is a device that detects when a new letter or package has been delivered to your mailbox using a PIR sensor and door reed switch. It can send a signal to your LoRa gateway, then the gateway sends a message via WiFi to Home Assistant "MQTT" or to WhatsApp allowing you to receive notifications directly into your phone. Or you can use it offline, the gateway display will show the number of letters received, Battery status, and signal strength.
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- YouTube video https://youtu.be/gf1WWKyEnbg
- My Shop
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- Mailbox Sensor https://www.pricelesstoolkit.com/
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- UNIProg Programmer https://www.pricelesstoolkit.com/
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- Gateway on Aliexpress LILYGO® TTGO LoRa32 V2.1_1.6 Version 433/868/915Mhz
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- Gateway on official lilygo Shop LILYGO® TTGO LoRa32 V2.1_1.6 Version 433/868/915Mhz
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- Battery Li-Ion 14500 800mA
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- Battery Li-Ion 14500 1200mA - ?
- Microcontroller "Attiny1616"
- LoRa Bands "433/868/915"
- PIR Sensor AM312 "With the option to turn it off"
- Onboard reed switch "optional"
- External reed switch "Input 2 Pin"
- Battery Holder for "Li-Ion 14500"
- Optional 2 Pin SMD LiPo Battery connector
- Build-in Battery Charger "Can be separated"
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- Connector USB-C
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- Charge status LED "Charging, Full"
- Extremely Low Power Consumption
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- Motion Sensor PIR 11.30uAh
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- Only reed switch 280nAh
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- Every data submission uses 65uA
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- TX LED "With the option to turn it off"
- Size
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- With charger "XXmm to XXmm"
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- Without charger "XXmm to XXmm"
- Programming Protocol
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- UPDI / Serial2UPDI
==============================
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- Before connecting the battery, make sure to check the connector polarity on your battery. This is especially important because many 1S LiPo batteries have inverted polarity.
For programming MailBox Guard, you can use my other open-source project "UNIProg Programmer" GitHub
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Additional Boards Manager URLs
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- megaTinyCore http://drazzy.com/package_drazzy.com_index.json
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Libraries Used
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- LoRa
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- PubSubClient
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- SSD1306
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- UrlEncode
- In
Mailbox_Guard_Sensor.ino - The settings in the gateway and in the sensor must match.
#define BAND 868E6 // frequency in Hz (ASIA 433E6, EU 868E6, US 915E6)
- In
Mailbox_Guard_Sensor.ino
String NewMailCode = "REPLACE_WITH_NEW_MAIL_CODE"; // For Example "0xA2B2";
String LowBatteryCode = "REPLACE_WITH_LOW_BATTERY_CODE"; // For Example "0xLBAT";
- In
Mailbox_Guard_Sensor.ino -
- The settings in the gateway and in the sensor must match.
LoRa.setSignalBandwidth(125E3); // signal bandwidth in Hz, defaults to 125E3
LoRa.setSpreadingFactor(12); // ranges from 6-12, default 7 see API docs
LoRa.setCodingRate4(8); // Supported values are between 5 and 8, these correspond to coding rates of 4/5 and 4/8. The coding rate numerator is fixed at 4.
LoRa.setSyncWord(0xF3); // byte value to use as the sync word, defaults to 0x12
LoRa.setPreambleLength(8); //Supported values are between 6 and 65535.
LoRa.disableCrc(); // Enable or disable CRC usage, by default a CRC is not used LoRa.disableCrc();
LoRa.setTxPower(20); // TX power in dB, defaults to 17, Supported values are 2 to 20
LoRa_Gateway_OLED.ino"For offline use" Display turns on and shows that there is a new letter in the mailbox "the number of letters", "signal strength" and "Battery State". After taking your mail, you need to press the reset button on the gateway.LoRa_Gateway_WhatsApp.ino- Sends a message to WhatsApp "You Have New Mail".LoRa_Gateway_MQTT.inoSends a row message and RSSI to MQTT Server.
- Change the BOARD definition in
board.haccording to your gateway Version " 1 = ENABLE / 0 = DISABLE ".
#define LORA_V1_0_OLED 0
#define LORA_V1_2_OLED 0
#define LORA_V1_3_OLED 0
#define LORA_V1_6_OLED 0
#define LORA_V2_0_OLED 1
| Name | V1.0 | V1.2(T-Fox) | V1.3 | V1.6 | V2.1 |
|---|---|---|---|---|---|
| OLED RST | 16 | N/A | N/A | N/A | N/A |
| OLED SDA | 4 | 21 | 4 | 21 | 21 |
| OLED SCL | 15 | 22 | 15 | 22 | 22 |
| SDCard CS | N/A | N/A | N/A | 13 | 13 |
| SDCard MOSI | N/A | N/A | N/A | 15 | 15 |
| SDCard MISO | N/A | N/A | N/A | 2 | 2 |
| SDCard SCLK | N/A | N/A | N/A | 14 | 14 |
| DS3231 SDA | N/A | 21 | N/A | N/A | N/A |
| DS3231 SCL | N/A | 22 | N/A | N/A | N/A |
| LORA MOSI | 27 | 27 | 27 | 27 | 27 |
| LORA MISO | 19 | 19 | 19 | 19 | 19 |
| LORA SCLK | 5 | 5 | 5 | 5 | 5 |
| LORA CS | 18 | 18 | 18 | 18 | 18 |
| LORA RST | 14 | 23 | 23 | 23 | 23 |
| LORA DIO0 | 26 | 26 | 26 | 26 | 26 |
- The settings in the gateway and in the sensor must match.
#define SignalBandwidth 125E3
#define SpreadingFactor 12
#define CodingRate 8
#define SyncWord 0xF3
#define PreambleLength 8
#define TxPower 20
float BAND = 868E6; // 433E6 / 868E6 / 915E6 /
- In
LoRa_Gateway_OLED.inoandLoRa_Gateway_WhatsApp.ino
String NewMailCode = "REPLACE_WITH_NEW_MAIL_CODE"; // For Example "0xA2B2";
String LowBatteryCode = "REPLACE_WITH_LOW_BATTERY_CODE"; // For Example "0xLBAT";
- In
LoRa_Gateway_MQTT.inoandLoRa_Gateway_WhatsApp.ino
const char* ssid = "Your_WIFI_SSID";
const char* password = "Your_WIFI_password";
- Only in
LoRa_Gateway_MQTT.ino
const char* mqtt_username = "Your_mqtt_username";
const char* mqtt_password = "Your_mqtt_password";
const char* mqtt_server = "Your_mqtt/homeassistant server IP";
const int mqtt_port = 1883;
- File
loragateway.yaml
mqtt:
sensor:
- name: "LoRa_Code"
state_topic: "LoRa-Gateway/Code"
- name: "LoRa_RSSI"
state_topic: "LoRa-Gateway/RSSI"