drone_communications
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| drone_communications [2022/09/28 21:32] – [Wireless Electronic Protocol Stack] jhagstrand | drone_communications [2023/09/10 02:32] (current) – [Cellular] jhagstrand | ||
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| * Sensor readings: GPS, compass, altimeter, speed, orientation | * Sensor readings: GPS, compass, altimeter, speed, orientation | ||
| * Battery charge level | * Battery charge level | ||
| + | |||
| + | Three sets of data to be communicated | ||
| + | - flight commands, radio to drone | ||
| + | - Telmetry, drone to GCS | ||
| + | - Video stream, drone to GCS | ||
| + | |||
| ===== Three transmission types ===== | ===== Three transmission types ===== | ||
| Line 223: | Line 229: | ||
| AT (Attention) commands, were created by Dennis Hayes for his 300 baud modem in 1981. | AT (Attention) commands, were created by Dennis Hayes for his 300 baud modem in 1981. | ||
| + | |||
| + | Tutorial: Use an ESP8266 to control an LED over the internet \\ | ||
| + | https:// | ||
| + | |||
| + | == ESP8266 Development Board == | ||
| + | |||
| + | There are several " | ||
| + | * Wemos D1 Mini | ||
| + | * NodeMCU | ||
| + | * Adafruit Heather Huzzah | ||
| + | * ESP8266 Thing Development Board, has onboard FTDI USB-to-Serial chip | ||
| Line 229: | Line 246: | ||
| Create an Access Point (AP) that allows only one connection. \\ | Create an Access Point (AP) that allows only one connection. \\ | ||
| Not used as a hub, but used for point-to-point communications between two devices. | Not used as a hub, but used for point-to-point communications between two devices. | ||
| + | |||
| + | ===== Speeds ===== | ||
| + | |||
| + | Hz - hertz, a measure of bandwidth \\ | ||
| + | bps - bitrate, limited by bandwidth and SNR \\ | ||
| + | |||
| + | |||
| + | ==== RC ==== | ||
| + | |||
| + | 72 MHz (older analog RC gear in the US) \\ | ||
| + | 35 MHz (older analog RC gear in Europe) | ||
| + | 433 MHz (RC and telemetry, in Europe) | ||
| + | 900-915 MHz (video and telemetry, in the US) \\ | ||
| + | 1.3 GHz (video) | ||
| + | 2.4 GHz (digital RC gear, video and telemetry) | ||
| + | 5.8 GHz (video) | ||
| + | |||
| + | https:// | ||
| + | |||
| + | ==== Cellular ===== | ||
| + | |||
| + | 2G \\ | ||
| + | 3G \\ | ||
| + | 4G \\ | ||
| + | 5G - theoretical max: 10 GHz \\ | ||
| + | |||
| + | === 5G vs 5GHz === | ||
| + | |||
| + | 5G - 5th generation cellular networks, a marketing term designed to be vague and misleading \\ | ||
| + | 5 GHz - a wifi band at 5000 hertz, as opposed to the alternative 2.4 GHz \\ | ||
| + | |||
| + | |||
| + | ==== Wifi ==== | ||
| + | |||
| + | 2.4 GHz \\ | ||
| + | 5 GHz | ||
| + | |||
| + | |||
| + | |||
| + | |||
| + | ==== ESP32-C5 ==== | ||
| + | |||
| + | The ESP32-C5 comes with dual-band WiFi 6 (802.11ax) and still has the backward compatible 802.11b/ | ||
| + | |||
| + | //Has this been used with Arduino at 5 GHz?// | ||
| + | |||
| + | https:// | ||
| + | |||
| + | |||
| + | ==== Espressif ==== | ||
| + | |||
| + | The company that makes the ESP chips and boards.\\ | ||
| + | Open source. \\ | ||
| + | IPO on Shanghai Stock Exchange (SSE) in June 2019.\\ | ||
| + | |||
| + | https:// | ||
| + | |||
| + | |||
| + | |||
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drone_communications.1664415178.txt.gz · Last modified: 2022/09/28 21:32 by jhagstrand