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Sending messages between ESP32s with ESP-NOW, without an access point, and knowing its limits

taught

Taught in

  • ESP-NOW

    Connected Devices and the Internet of Things

Requires

Required by

Local knowledge map

Local knowledge map

Analysing asset tracking, fleets and location systems Choosing a wireless technology by range, data rate, power,… Sending messages between ESP32s with ESP-NOW, without an… Choosing WPA2/WPA3 personal or enterprise security and… Explaining LTE-M and NB-IoT, SIMs, data plans and recurring… Explaining LoRa modulation, LoRaWAN gateways and network… Getting wall-clock time onto a device with NTP, timestampin… Joining a Wi-Fi network from an ESP32 in station mode,… Measuring and budgeting latency, throughput and loss… Reading CoAP requests and responses -- confirmable messages,… Describing UDP datagrams, their size limits, and what UDP… Explaining Wi-Fi bands, channels, SSIDs, CSMA/CA and… Addressing a program with a port and a socket, and reading… Reading Ethernet and Wi-Fi frames, MAC addresses and…

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Solid arrows are required prerequisites; dashed are recommended or helpful. Lower rows are more foundational. Click any box to jump to that concept.