value: function(opts, datahandler) {
let handle = 0;
let board = opts.board || five.Board.mount();
let unitName = opts.custom.unit || "MCP9808:0";
let openFlags = opts.custom.flags || 1;
let openOpts = opts.custom.opts || 0;
let freq = opts.freq || 250;
let proxyRDD = new RDD.RemoteDeviceDriver({board: board});
log.debug(`RemoteDeviceDriver is created.`);
let api = new API.MCP9808API({driver : proxyRDD});
log.debug(`MCP9808API is created.`);
let seq = new Sequencer(api,["open", "read", "write", "close", "read-continuous"],{});
log.debug(`Sequencer is created.`);
seq.on("error", (apiError) => {
log.error(`Error ${RDD.SC[apiError.status].sym} (${apiError.status}) ${RDD.SC[apiError.status].msg}.`);
});
seq.on("done", (apiResult) => {
log.debug(`Initialization steps completed.`);
});
api.on("read-continuous", (apiResult) => {
log.trace(`${unitName} says temp is ${apiResult.C}°C, ${apiResult.F}°F, ${apiResult.K}°K.`);
datahandler(apiResult.C);
});
let step = [
(apiResult) => {
log.debug(`Begin MCP9808 controller initialization processing.`);
api.open(unitName,RDD.DAF.FORCE,0);
},
(apiResult) => {
log.trace(`Opened ${apiResult.unitName} with handle ${apiResult.handle}.`);
handle = apiResult.handle;
api.setHighPower(handle);
},
(apiResult) => {
log.trace(`High power (continuous conversion) set.`);
api.setIntervals(handle,null,freq);
},
(apiResult) => {
log.trace(`Report interval has been set.`);
api.readContinuousTempC(handle);
},
(apiResult) => {
log.debug(`Continuous temperature reading started.`);
}
];
seq.start(step);
}