74 lines
2.1 KiB
Lua
74 lines
2.1 KiB
Lua
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-- need a wifi connection
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-- enter your wifi credentials
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local credentials = {SSID = "SSID", PASS = "PASS"};
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-- push a message onto the network
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-- this can also be done by changing gossip.networkState[gossip.ip].data = {temperature = 78};
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local function sendAlarmingData()
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Gossip.pushGossip({temperature = 78});
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print('Pushed alarming data');
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end
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local function removeAlarmingData()
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Gossip.pushGossip(nil);
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print('Removed alarming data from the network.');
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end
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-- callback function for when gossip receives an update
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local function treatAlarmingData(updateData)
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for k in pairs(updateData) do
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if updateData[k].data then
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if updateData[k].data.temperature and updateData[k].data.temperature > 30 then
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print('Warning, the temp is above 30 degrees at ' .. k);
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end
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end
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end
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end
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local function Startup()
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-- initialize all nodes with the seed except for the seed itself
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-- eventually they will all know about each other
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-- enter at least one ip that will be a start seed
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local startingSeed = '192.168.0.73';
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-- luacheck: push allow defined
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Gossip = require('gossip');
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-- luacheck: pop
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local config = {debug = true, seedList = {}};
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if wifi.sta.getip() ~= startingSeed then
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table.insert(config.seedList, startingSeed);
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end
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Gossip.setConfig(config);
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-- add the update callback
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Gossip.updateCallback = treatAlarmingData;
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-- start gossiping
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Gossip.start();
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-- send some alarming data timer
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if wifi.sta.getip() == startingSeed then
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tmr.create():alarm(50000, tmr.ALARM_SINGLE, sendAlarmingData);
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tmr.create():alarm(50000*3, tmr.ALARM_SINGLE, removeAlarmingData);
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end
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end
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local function startExample()
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wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED,
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function() print('Diconnected') end);
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print("Connecting to WiFi access point...");
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if wifi.sta.getip() == nil then
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wifi.setmode(wifi.STATION);
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wifi.sta.config({ssid = credentials.SSID, pwd = credentials.PASS});
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end
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print('Ip: ' .. wifi.sta.getip() .. '. Starting in 5s ..');
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tmr.create():alarm(5000, tmr.ALARM_SINGLE, Startup);
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end
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startExample();
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