- function update_graph()
- {
- bwxhr.get('<%=build_url("admin/status/wireless_status", curdev)%>', null,
- function(x, data)
- {
- var noise_floor = 255;
- var rate_floor = 60000;
-
- for (var i = 0; i < data.length; i++) {
- noise_floor = Math.min(noise_floor, data[i][NOISE]);
- rate_floor = Math.min(rate_floor, data[i][RATE]);
- }
-
- noise_floor -= 5;
-
- var data_max = 0;
- var data_scale = 0;
- var data_max_2 = 0;
- var data_scale_2 = 0;
-
- var data_rssi_avg = 0;
- var data_noise_avg = 0;
- var data_rate_avg = 0;
-
- var data_rssi_peak = 0;
- var data_noise_peak = 0;
- var data_rate_peak = 0;
-
- for (var i = data_stamp ? 0 : 1; i < data.length; i++)
- {
- /* skip overlapping entries */
- if (data[i][TIME] <= data_stamp)
- continue;
-
- data_rssi.push(data[i][RSSI] - noise_floor);
- data_noise.push(data[i][NOISE] - noise_floor);
- data_rate.push(Math.floor(data[i][RATE] / 100));
- }
-
- /* cut off outdated entries */
- data_rssi = data_rssi.slice(data_rssi.length - data_wanted, data_rssi.length);
- data_noise = data_noise.slice(data_noise.length - data_wanted, data_noise.length);
- data_rate = data_rate.slice(data_rate.length - data_wanted, data_rate.length);
-
- /* find peak */
- for (var i = 0; i < data_rssi.length; i++)
- {
- data_max = Math.max(data_max, data_rssi[i]);
- data_max_2 = Math.max(data_max_2, data_rate[i]);
-
- data_rssi_peak = Math.max(data_rssi_peak, data_rssi[i]);
- data_noise_peak = Math.max(data_noise_peak, data_noise[i]);
- data_rate_peak = Math.max(data_rate_peak, data_rate[i]);
-
- if (i > 0)
- {
- data_rssi_avg = (data_rssi_avg + data_rssi[i]) / 2;
- data_noise_avg = (data_noise_avg + data_noise[i]) / 2;
- data_rate_avg = (data_rate_avg + data_rate[i]) / 2;
- }
- else
- {
- data_rssi_avg = data_rssi[i];
- data_noise_avg = data_noise[i];
- data_rate_avg = data_rate[i];
- }
- }
-
- /* remember current timestamp, calculate horizontal scale */
- data_stamp = data[data.length-1][TIME];
- data_scale = (height / (data_max * 1.1)).toFixed(1);
- data_scale_2 = (height / (data_max_2 * 1.1)).toFixed(1);
-
- /* plot data */
- var pt_rssi = '0,' + height;
- var pt_noise = '0,' + height;
- var pt_rate = '0,' + height;
-
- var y_rssi = 0;
- var y_noise = 0;
- var y_rate = 0;
-
- for (var i = 0; i < data_rssi.length; i++)
- {
- var x = i * step;
-
- y_rssi = height - Math.floor(data_rssi[i] * data_scale);
- y_noise = height - Math.floor(data_noise[i] * data_scale);
- y_rate = height - Math.floor(data_rate[i] * data_scale_2);
-
- y_rssi -= Math.floor(y_rssi % (1/data_scale));
- y_noise -= Math.floor(y_noise % (1/data_scale));
-
- pt_rssi += ' ' + x + ',' + y_rssi;
- pt_noise += ' ' + x + ',' + y_noise;
- pt_rate += ' ' + x + ',' + y_rate;
- }
-
- pt_rssi += ' ' + width + ',' + y_rssi + ' ' + width + ',' + height;
- pt_noise += ' ' + width + ',' + y_noise + ' ' + width + ',' + height;
- pt_rate += ' ' + width + ',' + y_rate + ' ' + width + ',' + height;
-
- line_rssi.setAttribute('points', pt_rssi);
- line_noise.setAttribute('points', pt_noise);
- line_rate.setAttribute('points', pt_rate);
-
- function wireless_label(dbm, noise)
- {
- if (noise)
- return String.format("%d dBm (SNR %d dBm)", noise_floor + dbm - 255, dbm - noise);
- else
- return String.format("%d dBm", noise_floor + dbm - 255);
- }
-
- function rate_label(mbit)
- {
- return String.format("%d MBit/s", mbit);
- }
-
- label_25.firstChild.data = wireless_label(1.1 * 0.25 * data_max);
- label_50.firstChild.data = wireless_label(1.1 * 0.50 * data_max);
- label_75.firstChild.data = wireless_label(1.1 * 0.75 * data_max);
-
- label_25_2.firstChild.data = rate_label(1.1 * 0.25 * data_max_2);
- label_50_2.firstChild.data = rate_label(1.1 * 0.50 * data_max_2);
- label_75_2.firstChild.data = rate_label(1.1 * 0.75 * data_max_2);
-
- label_rssi_cur.innerHTML = wireless_label(data_rssi[data_rssi.length-1], data_noise[data_noise.length-1]);
- label_noise_cur.innerHTML = wireless_label(data_noise[data_noise.length-1]);
-
- label_rssi_avg.innerHTML = wireless_label(data_rssi_avg, data_noise_avg);
- label_noise_avg.innerHTML = wireless_label(data_noise_avg);
-
- label_rssi_peak.innerHTML = wireless_label(data_rssi_peak, data_noise_peak);
- label_noise_peak.innerHTML = wireless_label(data_noise_peak);
-
- label_rate_cur.innerHTML = rate_label(data_rate[data_rate.length-1]);
- label_rate_avg.innerHTML = rate_label(data_rate_avg);
- label_rate_peak.innerHTML = rate_label(data_rate_peak);
-
- /* reset timer */
- window.setTimeout(update_graph, 1000);
- }
- )
- }
-