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Fix SFP diagnostic monitoring data in web interface

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If the module is not internally calibrated, it is necessary to apply
calibration values to get meaningful results.
This commit is contained in:
Jan Hoffmann
2026-03-29 00:33:48 +01:00
parent 45ba32f65d
commit 6eaa1985aa
2 changed files with 90 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
html/main.js
+77 -5
View File
@@ -40,6 +40,78 @@ function drawPorts() {
}
}
function parseUint16(val) {
return parseInt(val, 16) & 0xffff;
}
function parseInt16(val) {
let valInt = parseInt(val, 16);
let num = valInt & 0x7fff;
if (valInt & 0x8000) {
return num - 0x8000;
}
return num;
}
function applyCalibrationSlopeOffset(val, cal) {
if (typeof cal !== 'string') {
return val;
}
if (cal.startsWith("0x")) {
cal = cal.substring(2);
}
if (cal.length != 8) {
return val;
}
let slope = parseUint16(cal.substring(0, 4)) / 256;
let offset = parseInt16(cal.substring(4, 8));
return slope * val + offset;
}
function applyRxPowerCalibration(val, cal) {
if (typeof cal !== 'string') {
return val;
}
if (cal.startsWith("0x")) {
cal = cal.substring(2);
}
if (cal.length != 40) {
return val;
}
let bytes = cal.match(/.{1,2}/g).map(function (x) { return parseInt(x, 16); });
let view = new DataView(new Uint8Array(bytes).buffer);
return view.getFloat32(0) * Math.pow(val, 4)
+ view.getFloat32(4) * Math.pow(val, 3)
+ view.getFloat32(8) * Math.pow(val, 2)
+ view.getFloat32(12) * val
+ view.getFloat32(16);
}
function decodeSfpTemp(val, cal) {
let temp = parseInt16(val);
return applyCalibrationSlopeOffset(temp, cal) / 256;
}
function decodeSfpVcc(val, cal) {
let vcc = parseUint16(val);
return applyCalibrationSlopeOffset(vcc, cal) / 10000;
}
function decodeSfpTxBias(val, cal) {
let bias = parseUint16(val);
return applyCalibrationSlopeOffset(bias, cal) / 500;
}
function decodeSfpTxPower(val, cal) {
let txPower = parseUint16(val);
return applyCalibrationSlopeOffset(txPower, cal) / 10000;
}
function decodeSfpRxPower(val, cal) {
let rxPower = parseUint16(val);
return applyRxPowerCalibration(rxPower, cal) / 10000;
}
function update(callback) {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
@@ -98,13 +170,13 @@ function update(callback) {
iHTML += "<tr><td>Model</td><td>:</td><td>" + p.sfp_model + "</td></tr>";
iHTML += "<tr><td>Serial</td><td>:</td><td>" + p.sfp_serial + "</td></tr>";
if (hasExtendedStatus) {
iHTML += "<tr><td>Temp</td><td>:</td><td>" + (Number(p.sfp_temp) >> 8) + "." + ((Number(p.sfp_temp) & 0xff)/256.0 * 100).toFixed(0) + "&#8239;&#8451;</td></tr>";
iHTML += "<tr><td>Vcc</td><td>:</td><td>" + (Number(p.sfp_vcc) / 10000.0).toFixed(2) + "&#8239;V</td></tr>";
iHTML += "<tr><td>Temp</td><td>:</td><td>" + decodeSfpTemp(p.sfp_temp, p.sfp_temp_cal).toFixed(2) + "&#8239;&#8451;</td></tr>";
iHTML += "<tr><td>Vcc</td><td>:</td><td>" + decodeSfpVcc(p.sfp_vcc, p.sfp_vcc_cal).toFixed(2) + "&#8239;V</td></tr>";
iHTML += "<tr><td>TX-Fault</td><td>:</td><td>" + (Boolean(Number(p.sfp_state) & 0x4)) + "</td></tr>";
iHTML += "<tr><td>TX-Disabled</td><td>:</td><td>" + (Boolean(Number(p.sfp_state) & 0x80)) + "</td></tr>";
iHTML += "<tr><td>TX-Bias</td><td>:</td><td>" + (Number(p.sfp_txbias) / 500.0).toFixed(1) + "&#8239;mA</td></tr>";
iHTML += "<tr><td>TX-Power</td><td>:</td><td>" + (Number(p.sfp_txpower) / 10000.0).toFixed(3) + "&#8239;mW</td></tr>";
iHTML += "<tr><td>RX-Power</td><td>:</td><td>" + (Number(p.sfp_rxpower) / 10000.0).toFixed(3) + "&#8239;mW</td></tr>";
iHTML += "<tr><td>TX-Bias</td><td>:</td><td>" + decodeSfpTxBias(p.sfp_txbias, p.sfp_txbias_cal).toFixed(1) + "&#8239;mA</td></tr>";
iHTML += "<tr><td>TX-Power</td><td>:</td><td>" + decodeSfpTxPower(p.sfp_txpower, p.sfp_txpower_cal).toFixed(3) + "&#8239;mW</td></tr>";
iHTML += "<tr><td>RX-Power</td><td>:</td><td>" + decodeSfpRxPower(p.sfp_rxpower, p.sfp_rxpower_cal).toFixed(3) + "&#8239;mW</td></tr>";
}
// Not all devices & modules have LOS pin...
const rx_los_pin = p.sfp_los !== null ? Boolean(Number(p.sfp_los)) : null;