P1 Poort logger/ gateway

Firmware for ESP32 to read and parse data from Smart meter, receive data from other measurement devices trough ESPNOW, and send all this data to the backoffice trough HTTPS POST

TODO's and considerations

• Parse P1 data
• Use HTTP request to send data to backoffice
• Implement ESPNOW for monitor communication
• Use https instead of http
• Change JSON parameters to the right format
• Sync RTC clock with time from smart meter readout
• Add provisioning to exchange the WiFi credentials and unique id trough App
• Compatible for esp32 with more then 4mB flash
• Use esp32 8mB flash for BLE provisioning
• Test provisioning and port to current main software
• Add button and LED functionality
• Send oldest(cached/buffered) data first instead of newest
• Improve timing/ system states
• Variable "amount_filled_global_data_positions" is used by two cores for ESPNOW callback "OnDataRecv" and in loop to create smartmeter message. Suggest to make this failproof
• Remove debugging code

Dependencies

#include <Arduino.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <utils.h>
#include <espnow_settings.h>
#include <ArduinoJson.h>
#include <esp_now.h>
#include <BLE.h>

Header files for program settings

The files utils.h.bak and espnow_setting.h.bak contain program enviroment variables. To use the simply remove .bak from the file name and fill in the correct values

JSON formats Backoffice communication

Smart meter

{
    "id": "FF:FF:FF:FF:FF",
    "dataSpec": {
        "lastTime": "201023113050", //=2020/10/23 @ 11:30am 50 sec local time
        "interval": 10,
        "total": 6
    },
    "data": {
        "dsmr": [
            50
        ],
        "evt1": [
            2955336
        ],
        "evt2": [
            3403620
        ],
        "egt1": [
            2
        ],
        "egt2": [
            0
        ],
        "ht": [
            2
        ],
        "ehv": [
            349
        ],
        "ehl": [
            0
        ],
        "gas": [
            2478797
        ],
        "tgas": [
            201023113008
        ]
    }
}

room temperature monitor

{
    "id": "FF:FF:FF:FF:FF",
    "dataSpec": {
        "lastTime": 1606915033, //=12/02/2020 @ 1:17pm (UTC)
        "interval": 10,
        "total": 6
    },
    "data": {
        "roomTemp": [
            20.1,
            21.2,
            22.3,
            23.4,
            24.5,
            25.6
        ]
    }
}

Boiler temperature monitor

{
    "id": "FF:FF:FF:FF:FF",
    "dataSpec": {
        "lastTime": 1606914671, //=12/02/2020 @ 1:11pm (UTC)
        "interval": 10,
        "total": 6
    },
    "data": {
        "pipeTemp1": [ //this should be the 'hot' outgoing pipe
            50.1,
            51.2,
            52.3,
            53.4,
            54.5
        ],
        "pipeTemp2": [ //this should be the 'cold' incoming pipe
            50.1,
            51.2,
            52.3,
            53.4,
            54.5
        ]
    }
}