loramessenger:project
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loramessenger:project [2021/07/16 12:15] – [Lora Half Duplex Communication Protocol Design] neilhao | loramessenger:project [2023/02/11 17:30] (current) – external edit 127.0.0.1 | ||
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- | ====== Lora Messenger ====== | + | ====== |
== - Optimized RF Design for Maximum Coverage == | == - Optimized RF Design for Maximum Coverage == | ||
- | Neil Hao | + | [[http:// |
+ | |||
+ | Starts from 2021/Jul/09 to ~~LASTMOD~~ (Last Modification) | ||
- | 09-Jul-2021 | ||
===== Overview ===== | ===== Overview ===== | ||
- | This project aims to design a Lora Messenger which does not depend on Internet or Cellular network. In other words, users can chat with others by using this credit card size Lora device and a smartphone with Bluetooth without Internet and Cellular network. | + | This project aims to design a credit card size Lora Messenger which does not depend on Internet or Cellular network. In other words, users can chat with others by using this credit card size Lora device and a smartphone with Bluetooth without Internet and Cellular network. |
For the hardware design, a high efficiency compact Lora PCB Antenna and an ultra-low noise figure amplifier had been designed for maximum the communication range. | For the hardware design, a high efficiency compact Lora PCB Antenna and an ultra-low noise figure amplifier had been designed for maximum the communication range. | ||
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The coverage of this credit card size Lora device was tested in the urban area. In the experiment (TX:14dBm, Freq: | The coverage of this credit card size Lora device was tested in the urban area. In the experiment (TX:14dBm, Freq: | ||
- | [[https:// | + | [[https:// |
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|Android App | [[https:// | |Android App | [[https:// | ||
+ | ---- | ||
===== Reference ===== | ===== Reference ===== | ||
[1] Richard Wallace. Design Note DN024: Monopole PCB Antenna with Single or Dual Band Option . Retrieved Jul 11, 2021, from https:// | [1] Richard Wallace. Design Note DN024: Monopole PCB Antenna with Single or Dual Band Option . Retrieved Jul 11, 2021, from https:// |
loramessenger/project.1626437735.txt.gz · Last modified: 2023/02/11 17:30 (external edit)