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<\/a><\/p>\nThe system relies on packets being repeated between nodes, before hitting a “gateway” node which is connected to the internet. This may be a node connected to a PC, or a raspberry pi with an RFM69 radio. After seeing the ESP8266 popping up in various places, I decided to order a couple of modules and design a PCB for a simple AVR based wifi node.<\/p>\n
The PCB was very quick to put together and Phil’s repeater code had it working almost straight away.<\/p>\n I put together a library for sending HTTP POST requests to the ukhasnet server from an ESP8266 via AT commands. I updated my ESP chip with this firmware (File:V0.9.2.2_AT_Firmware.bin.zip from\u00a0http:\/\/www.electrodragon.com\/w\/Wi07c<\/a> \/ \u00a0 Mirror<\/a>) to reduce the speed down to 9600 baud. The chip does indeed work with WPA2 (which I was not expecting, possibly down to the firmware update)<\/p>\n The node has been running now for about 72 hours with no apparent problems \ud83d\ude42<\/p>\n The ESP8266 Library, repeater\/gateway code (credit to Phil) and PCB files are up at https:\/\/github.com\/chrisstubbs93\/ESP8266<\/a><\/p>\n The basic upload sketch looks something like this: Since the UKHAS conference in August I have been playing with some UKHASnet nodes, which are “A simple wireless network aimed for use with low power licence exempt wireless modules”. The system was developed by members of the UKHAS community, … Continue reading <\/a><\/p>\n<\/a><\/p>\n
\n<\/code><\/p>\n#include \"ESP8266.h\"\r\n#include \"wifiConfig.h\" \/\/this is where you need to set your SSID and Password\r\n#define DST_IP \"212.71.255.157\" \/\/ukhas.net 212.71.255.157\r\n#define WIFI_EN 7 \/\/CH_PD\r\n\r\nESP8266 esp8266 = ESP8266();\r\n\r\nvoid setup()\r\n{\r\n Serial.begin(9600); \/\/Open serial communications \r\n esp8266.initialise(Serial, WIFI_EN); \/\/Pass it over to the ESP8266 class, along with the pin number to enable the module (CH_PD)\r\n while (!esp8266.resetModule()); \/\/reset module until it is ready\r\n esp8266.tryConnectWifi(SSID, PASS);\/\/connect to the wifi\r\n esp8266.singleConnectionMode(); \/\/set the single connection mode\r\n}\r\n\r\nvoid loop()\r\n{\r\n esp8266.uploadPacket(DST_IP, \"your_data\");\r\n delay(10000);\r\n}\r\n<\/pre>\n
\n<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"