#lora transmitter and receiver arduino

[elcereza]

Transferência de Arquivos via LoRa

Um projeto que venho fazendo há alguns meses e que muitas pessoas estavam interessadas em transmitir imagens e agora será possível, mas claro, respeitando as limitações.

Transferência da arquivos via LoRa é possível assim como qualquer outra modulação, mas existem desafios particulares nessa tarefa que em outras modulações podem ser mais fáceis.  Sobre a modulação LoRa Antes mesmo de partimos para a transferência de arquivos via LoRa, é preciso entender que o LoRa não foi feito para esse tipo de aplicação e sim para dispositivos IoT, mesmo embora tenha uma taxa…

[makerspacelt]

Hack and Tell #26

This time we had 4 interesting presentations

To no one's great surprise, the 26th Hack&Tell began with the Photography Turntable: Part Two, told by Darius. Those who attended the previous Hack&Tell, know that the first iteration of this project turned out to be somewhat limited due to the friction and lack of rigidity, that the stepper motor could not overcome. This time, Darius used a larger, more robust case, a powerful PSU from a PC, and a Raspberry Pi to control it all. Since photography is a light-sensitive matter, the feedback from this device was provided by a synthesized voice, speaking (or cursing) in Russian, as the Lithuanian variant was simply incomprehensible. This time, PCB was milled rather than etched. There was a more though-out gear and belt reduction system, and a ball bearing to support larger weights on the turntable top. With a white background stand and light-diffusing fabric, the device finally works like intended and can be used to take pictures of objects as large as a CRT TV. 

Next, Marius made a shot for the stars with a telescope project. The inspiration for it came from the book "How to make a telescope" by J. Texereau, which described the procedure of grounding telescope mirrors but omitted the explanation of how they should be aluminized. Because of that, the idea was put on hold, but then, during the Makerspace clean-up effort, Marius adopted an old video projector that was about to be thrown out and decided to use its lense to build a Keplerian telescope. This type of telescope does not require precisely grounded lenses, nor a very accurate assembly and the math behind the dimensions is quite simple. Using a cylindrical bottle box, a cut-off PVC pipe, and another, little lense from a microscope, Marius assembled it all and even took a few test shots. Now, all that remains is a more robust frame, a tripod mounting point, and a proper attachment for a photo camera. 

Hack&Tell continued with Renardas story about a remotely controlled lamp that he developed from scratch to a final product, after being contracted by local hunters who needed illumination for specific spots in their hunting grounds. Since this lamp is operated off a custom made 18650 LiPo cell battery bank, it required a reliable, long-range, power-saving method of communication, LoRa fit that description perfectly. After testing data transfers between two Arduino Nano microcontrollers connected to LoRa receivers-transmitters, Renardas soldered it all on perf-boards and housed in separate plastic cases. The lamp itself was a high-powered LED, so powerful that it even required a heat sink. Even though this project took much more time and money than initially intended, Renardas delivered the final product without compromise and even wrote a user manual for it. Heres the link to his blogpost http://9v.lt/blog/remote-controlled-outdoor-light/

Finally, Justinas told us about a small-scale model of a sailing dinghy that he is developing and planning to construct a full-scale next summer. The key point of this design is a double floor - an air-tight compartment that provides extra buoyancy and allows the boat to bail the water through the transom without the need for the sailor to waste his time with a bucket during a race. This boat was designed with Solidworks, scaled-down, parts were flattened and designed to fit on two A4 cardboard sheets, and then cut out with Makerspace laser cutter. The tiny pieces were then glued together, the assembled model was varnished for waterproofing, and tested out in the sink. The double floor and water bailing system worked fine, but testing revealed that the stability of this boat isn't that great, and will require further improvements to make it viable for a full-scale build. Perhaps there will be a Part Two for this project as well? 

After a nerve-stretching vote, Darius continued his invincible winning streak with yet another victory. The bar is set really high now...

[mokosmart]

LoRaWAN Temperature and Humidity Sensor

We use the LoRaWAN temperature humidity sensor for detecting any changes in moisture and temperature. It then reports these changes to the LoRaWAN gateway. So, the LoRaWAN gateway transmits this data to the cloud. Hence, we can see this information by accessing it through a smart device and therefore we can use it as per our needs. We typically use such temperature humidity sensor in various industries and in remote environments. A LoRaWAN temperature and humidity sensor don’t consume too much power. Hence, they are not only economical but also very efficient. In this article, we will tell you all that you need to know about the LoRaWAN temperature humidity sensor.

Working Process of LoRaWAN Temperature and Humidity Sensor

In this section, we discuss how temperature and humidity sensors work. Therefore, the following is a description of its working.

It includes two separate detection probes. So, one probe is for detecting the change in the temperature. However, the second probe is for detecting the change in humidity.

Whenever there is a change in temperature the dedicated probe is able to detect it. And this probe records this change. Similarly, any change in humidity is detected by its dedicated probe. So, this detection is then consequently recorded.

LoRaWAN temperature humidity sensor is often placed in remote locations where they form the LoRa nodes.

Hence, each cluster of remote LoRa nodes is connected to a singular LoRaWAN gateway.

A collection of LoRaWAN gateways form a LoRa network. The LoRaWAN gateways often communicate with the LoRa network through cloud computing.

The measurements recorded by a LoRaWAN temperature humidity sensor are then converted into a LoRa signal and sent to the closest LoRaWAN gateway.

So, the LoRaWAN gateway then receives the LoRa signal from a LoRaWAN temperature humidity sensor. And then it transmits this signal to the dedicated IoT cloud network. From there the information is accessible to any smart device such as a PC, tablet, cell phone, or laptop.

LoRa temperature sensor is often programmable. So, we can set its measurement frequency. This means that it takes temperature and humidity measurements after specified intervals. So, these measurements are then transmitted to the LoRaWAN gateway and so on after fixed periods of time.

LoRa temperature and humidity sensors consume very little power so they are very cost-effective and deliver excellent performance.

How to Interface an IoT temperature sensor?

This section is dedicated to the interfacing of the IoT temperature and humidity sensor. So, here are the detailed steps.

You will have to first select the temperature and humidity sensor that you want to use.

Then you will have to use something which will convert the analog measurements recorded by these sensors into digital signals. So, you can use a microcontroller like Arduino or Raspberry Pi for this purpose.

However, if you use microcontrollers for the deployment of a large number of sensors then it might cost you a lot.

After integrating the temperature or humidity sensor with the microcontroller, you will have to integrate a transmitter module. This transmitter module will send the recorded values in the form of a signal to the receiver.

So, you will have to then attach the receiver to a remote server. This remote server will serve as a network node.

You will then have to seek the help of a third party to provide you cloud services. The cloud service will link the remote server with the rest of your IoT network and you can then use it as per your needs.

A Better Alternative: LoRaWAN Temperature and Humidity Sensor

However, if you use the LoRaWAN temperature humidity sensor for your IoT network then it will save you a lot of hassle. You can connect it to a LoRa node without relying on relatively expensive microcontrollers. Additionally, you won’t have to use receivers and transmitters because LoRa nodes can communicate with the LoRaWAN gateways on their own. The LPWAN protocol operates on open bandwidths so you won’t need the help of a third-party service. Hence, you can easily send the data through a LoRa signal directly to your cloud server. Then you can easily access this data and analyze it for various purposes by using a computer or mobile device.

Applications of LoRaWAN Temperature Humidity Sensor

In this section, we will briefly look at some of the applications of the LoRaWAN temperature humidity sensor.

Smart Agriculture

Large agricultural and animal farms need to closely monitor the temperature and humidity. So that they are able to better monitor their performance and favorable conditions. Sometimes farm owners have to cover vast areas so they are unable to take physically measure temperature and humidity in all locations. Hence, we can easily take temperature and humidity measurements by using LoRaWAN.

Monitoring of Environment Conditions

We often use wireless temperature and humidity sensor for monitoring the environmental conditions in various remote locations. These measurements will allow us to predict extreme weather and environmental conditions well in advance such as flooding.

Smart Buildings

It is difficult to detect internal and external environmental changes in large buildings. Hence, we can use an IoT temperature sensor for detecting any significant temperature and humidity change. This allows for better detection of extreme conditions and builds better fire alarms.

Industrial Control

Industries rely on various manufacturing processes that involve monitoring of different parameters. Temperature and humidity are some of the most important industrial parameters. Hence, it is necessary for us to effectively measure them. A LoRaWAN temperature and humidity sensor allow for a large number of measurements and convenience to access them.

LoRaWAN Temperature Humidity Sensor By MOKOSmart

MOKOSmart is a renowned name when it comes to IoT products. Our LoRaWAN Temperature and Humidity Sensor offers support for CN470MHZ and AS923MHZ. It has an 8000mAh battery which has a lifespan of over 10 years. It allows for very accurate temperature and humidity measurements. You should contact us if you want to know more details.

[planetarduino]

Arduino device helps keep dogs safe from overheating

Pets bring an untold amount of joy into our lives, but unfortunately they aren’t allowed to go everywhere that humans are. Of course this makes sense in many situations, but if you’d like to take your dog with you wherever you go, this means occasionally leaving poochie in the car. Along with leaving the sunroof and windows open, this project’s author also came up with a transmitter and receiver to monitor the temperature inside of the car with a series of LED pulses.

The car unit consists of an Arduino Mega, along with a temperature sensor and LoRa transciever. The receiver takes this wireless information, which can be reliably read at a range of 250 meters (820 feet) in an urban environment, and gives the user a series of blinks to assure Max’s (the dog) human that he’s not overheating!

You can find the entire build’s write-up here, or check out its code on GitHub.

Arduino device helps keep dogs safe from overheating was originally published on PlanetArduino