Transmit sensor data from remote locations without internet. Transfer data to email, text, Google Sheets, IFTTT, Home Assistant, and more for less than $2 per month.
An inexpensive IoT SIM card gains access to the cloud via a cellular connection.
The HUB connects to the cellular network or wifi or both.
The HUB can operate as a stand-alone unit with its own sensors.
The HUB can also collect data wirelessly from separate sensor platforms.
The hub software - AmbientHUB - and the sensor software - AmbientAP - are written in C++ with the using the Arduino IDE.
The AmbientHUB software controls an ESP32 micro-controller connected with onboard sensors and an optional OLED display.
Available
Additional development since then is reflected below and in the software.
The AmbientHUB software can receive the AmbientAP sensor data using the listed protocols.
-
httpwhere each sensor is configured as a server which can be polled by the hub using a GET command. -
ESP-Nowa lighter footprint protocol by which the sensors push the data to the hub based on its MAC address. https://www.espressif.com/en/products/software/esp-now/resources
The AmbientHUB software collects the sensor values for hourly transmission via the Hologram IoT cellular platform to the listed website services.
-
https://io.adafruit.com/ MQTT for dashboard and redundant IFTTT webhook route
-
https://ifttt.com/ for notifying to up to 20 email accounts plus Google sheets
-
https://dweet.io/ which simply saves the messages in scratchpad format as a backup in case of IFTTT failure
-
Home Assistant or any MQTT Broker using a local wifi router
-
Telegram for tailored commands
The AmbientHUB software provides
immediate alerts when sensors cross adaptive thresholds.
-
An ESP32 or a D1 Mini 8266 micro-controller
-
temperature / humidity sensors
BME-280, MCP9808,DHTxx, AHT10, SHT20 -
An optional
SSD1306OLED display https://www.amazon.com/gp/product/B07W1PT6VK -
DC 5V 1 Channel Relay Module Board Shield High/Low Level Trigger with Optocoupler