In Progress



Project description:

To build a battery operated autonomous sensor device capable of the following functionality:

Scope of functionality:

• Reading of the configuration from the SD card and application if it is different from the one already stored in the EEprom

• Taking the time reference (from GPS Ublox NEO 6)

• Reading the actual position (Lat, Long, Alt, - from GPS Ublox NEO 6)

• Reading the air particle sensor data (PLANTOWER 1003) (via serial interface Tx, Rx, Enable, Reset, 9600.8, N – TTL Levels - 3.3v).

• Read the Ambient Temperature, RH and BP (with BME280 sensor)

• Read the current voltage of the battery

• Transmission of the current data to the MQTT broker via Internet (if Wifi is connected and available – This behavior should be a parameter of config. as well) .

• Transmission of the current data via LORA (if Wifi unavailable– This behavior should be a parameter of config. as well).

• Capability to download the stored data via WIFI (Local AP)

• Capability to upload the stored data file via internet to a WEB site (receiving code to be developed as well)

• Storage of the data on the SD card (format in text, fields separated by commas)

• (Timestamp, Data)

• Storage of the configuration in EEprom and in the microSD.

Configuration parameters:

• Device ID

• URL of the MQTT Broker

• Reading intervals for the sensors (for each sensor)

• Frequency -interval- of real time data transmission

• Data collection frequency for storage in SD.

• Capability to remotely change/update config

• Behavior of the data transmission (auto, via LORA, Via WIFI)

Capability to remotely change/update config via MQTT message


• Verify the operation of the software.

• Verify the functioning of communications

• Verify the integrity of power suspensions, interruption of communications, etc.


• Working developed software (carefully documented source code)

• Conections Diagram.

Other conditions:

The design may use an Arduino, ESP32 or ESP8266, (most convenient, but keeping in mind cost-effectiveness, energy consumption and size).

Battery Power:

• Lipo 16650 x 2


• 10 days to develop SW

Skills: Arduino, C Programming, Electrical Engineering, Electronics, Microcontroller

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About the Employer:
( 1 review ) Bogotá, Colombia

Project ID: #19198943

Awarded to:


Hello, my name is Maria! Im located in Colombia. I have worked with similar projects, I would like to discuss more about the project and budget acoording to the exactly requeriments. Regards

$790 USD in 34 days
(9 Reviews)

6 freelancers are bidding on average $765 for this job


Hi There, We will design, built, test and ship fully working hardware. We will build the device keeping in view of low cost and durability. Please feel free to contact us. Best Regards, Shahbaz.

$3000 USD in 45 days
(56 Reviews)

Hello! I am very interested in your post project. i have rich experience on it. I think this project is very suitable for me and i am sure i can give you good result . I can help you if you'd like looking forwar More

$200 USD in 3 days
(6 Reviews)

I am an expert in Algorithm, Electrical Engineering, Mathematics, Matlab and Mathematica, Software Architecture, who consistently delivers great work on time, every time? That's exactly what I'll do for you. I've never More

$200 USD in 1 day
(7 Reviews)

Hello, My name is Andrei, i am a Romanian IOT Developer with a lot of experience in IOT projects and automatics . I have look at your project , the requirements are a little bit unfinished , i will have some q More

$150 USD in 3 days
(9 Reviews)

I DO NOT OUTSOURCE I have been a freelancer for the past 8 years, I believe that my experience and skill in this background will prove to be of great help to you. Contact me to discuss more on the details

$250 USD in 10 days
(4 Reviews)