LilyGO®TTGO T-Impulse
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- Автор: Super User
- Родительская категория: Заметки
- Категория: Электроника / cхемотехника
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The T-Impulse is an example of cutting edge technology. It contains (some of the most popular):
- STMicroelectronics STM32L073Z Low Power MCU ;
- Semtech SX1276 Long Range Low Power RF Transceiver with TCXO clock source ;
- Sony CXD5603GF Low Power GNSS Receiver ;
- TDK InvenSense ICM-20948 Inertial Measurement Unit ;
- 0.49" I2C OLED display
-
In the air:
Aircraft, UAV or balloon onboard location beacon.
-
On the ground:
One can use it to track an elderly relative, kid, pet, alpine climber, vehicle & etc. location.
Just turn your Bracelet on, then wait until the device will pick GNSS satellites up. It will start transmitting automatically afterwards.
By default, the Bracelet is configured to operate over FANET radio protocol. You can further select other protocol through .
When other air traffic with the same radio protocol been enabled will fly around - the pilot will be able to see you and avoid.
You may consider to use it in conjunction with SoftRF
HALO antenna what is it. An effective small antenna
- Информация о материале
- Автор: Super User
- Родительская категория: Заметки
- Категория: Электроника / cхемотехника
- Просмотров: 1146
A halo antenna, also known as a halo, is a specific type of antenna that consists of a center-fed dipole antenna. The dipole, which has a length equal to half the wavelength, is bent into a circular shape with a break directly opposite the feed point. The ends of the dipole are positioned close to each other but do not touch. By modifying the cross-section of the ends, an air capacitor can be formed. The spacing of this capacitor is adjusted to fine-tune the resonant frequency of the antenna.
Typically, the halo antenna is mounted horizontally. In this configuration, it exhibits an approximate omnidirectional radiation pattern, meaning it radiates equally in all directions around the horizontal plane. Moreover, the radiation from this antenna is horizontally polarized, which means that the electric field of the radiated signals is primarily oriented in a horizontal direction.
Overall, the halo antenna's unique design and characteristics make it well-suited for applications where omnidirectional coverage and horizontal polarization are desired.
LoRaWAN: controlling of downlink on Datacake
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- Автор: Super User
- Родительская категория: Заметки
- Категория: Программирование
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function Encoder(measurements, port) {
// WARNING!!! Please note that this is UTC Time!!!
// Please convert to your local timezone!!!
var startTime = '07:00:00'; // 9am CET
var endTime = '16:00:00'; // 6pm CET
var currentDate = new Date()
startDate = new Date(currentDate.getTime());
startDate.setHours(startTime.split(":")[0]);
startDate.setMinutes(startTime.split(":")[1]);
startDate.setSeconds(startTime.split(":")[2]);
endDate = new Date(currentDate.getTime());
endDate.setHours(endTime.split(":")[0]);
endDate.setMinutes(endTime.split(":")[1]);
endDate.setSeconds(endTime.split(":")[2]);
// Check if is valid
var valid = startDate < currentDate && endDate > currentDate
// if the current time lies within the desired timeframe
if (valid) {
// send the actual downlink, replace with yours
if(measurements.LED_ON.value) return [1];
else return [0];
}
// in case it is not valid, do not return anything here
// in order to abort sending a downlink
}
To realize more:
CoCo Antenna 868M Collection
- Информация о материале
- Автор: Super User
- Родительская категория: Заметки
- Категория: Электроника / cхемотехника
- Просмотров: 1229
2. https://keptenkurk.wordpress.com/2018/03/26/a-lora-868mhz-collinear-antenna/
3. https://keptenkurk.files.wordpress.com/2018/03/coaxcollinearlora1.jpg
SharpDevelop-5.2.1 (Alternate of Visual Studio)
- Информация о материале
- Автор: Super User
- Родительская категория: Заметки
- Категория: Программирование
- Просмотров: 1315
Рейтинг: 5 / 5
Легковесный простой и быстрый как в старые добрые времена
Kt
Enjoy!
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