Design of solar disaster relief communication network circuit scheme based on ESP32 + LORA MESH technology

Disaster Area Network (DAN) is a heterogeneous wireless mesh network that utilizes a LORA modulation scheme to perform point-to-point or point-to-multi-point connection between nodes. The firmware is using it on the ESP32 development board. The client is connected to the local WiFi hotspot to access the chat interface in the browser, or use the Android app Functional Bluetooth mode device, and Communication is performed between any two nodes through the LORA without a server or gateway. Distance vector, avoid loop, understand the limited packet route for network topology Minimal design can easily re-implement in many devices, No connection protocols do not need to be confirmed, so as not to use airspace Bluetooth or WiFi You should choose to use Bluetooth or WiFi to access the device. If you plan to use the Bluetooth / Android app, these boards will enter WiFi mode. You should re-refresh the device to comment out of WiFi and cancel the comment to Bluetooth. Firmware details Disaster broadcast firmware consists of a single "server" and multiple "clients" and "middleware" located between the client and the server. From logically, in the sense of software, rather than from the literal network, they are "servers" and "clients". The following is the currently implemented module and describes its purpose: DISASTERSERVER: Disasterradio: From the client to the primary "server" to send it to other clients DisasterClient: Loraclient: interface with Loraalayer2 WebSocketClient: WebSocket connection from the web application StreamClient: For Arduino Street, currently used in Serial Console TCPCLIENT: Server similar to Telnet HistoryRecord: Record the message to the SD card (or restricted queue in memory) OLEDCLIENT: Displays the message on the screen (mainly for debugging purposes, but finally I want to use it for some kind of mobile disaster broadcast terminal) GPSCLIENT: Concept verification, connection with serial GPS module to periodically be labeled your current location Disastermiddleware: WelcomeMessage: (very simple, in main.cpp) Show Welcome to the client when the client connection is connected HistoryReplay: Displays history to the client when the client is connected Console: Implement a simple console with chat features (similar to web applications) and some / commands (I have used symmetrical syntax of IRC, but you can easily implement the getopt version) Disaster history: HistorySD records history to SD card HistoryMemory records history to the restricted queue in memory (default is 10 messages) Be Be Article Source HackADAY

Our other product:

Professional lightning protection system for Tower	Professional FM Radio Station Equipment Package	FMUSER FU-1000C 1000W FM Transmitter With USB Audio Input Interface
FMUSER 200W FM Radio Broadcasting Package	Hotel IPTV Solution	FMUSER FSN-1000T V5.0 1KW FM Radio Broadcast Transmitter