Work on NMEA2000 device list

web/index.js

@@ -973,6 +973,14 @@
             })
             .catch(function (err) { alert("unable to load config: " + err) })
     }
+    function loadDeviceList() {
+        getJson("api/devices")
+            .then(function(devices) {
+                let deviceForm = document.getElementById('devicePage');
+                 console.log("Device form called");
+            })
+            .catch(function (err) { alert("unable to load devicelist: " + err) })
+    }
     // New hash function by SubtleCrypto Browser API
     async function hashString(str) {
         const enc = new TextEncoder();
@@ -1089,6 +1097,9 @@
             showOverlay(text, true);
         });
     }
+    buttonHandlers.reloadDevices=function() {
+        console.log("Button reload devices");
+    }
     function handleTab(el) {
         let activeName = el.getAttribute('data-page');
         if (!activeName) {
@@ -1394,7 +1405,23 @@
                                 }
                             }
                         }
+                        // calculate MD5 hash of firmware to upload
+                        let md5hash;
+                        const fwreader = new FileReader();
+                        fwreader.addEventListener('load', function (e) {
+                            const content = new Uint8Array(e.target.result);
+                            let binary = "";
+                            const chunkSize = 0x8000;
+                            for (let i = 0; i < content.length; i += chunkSize) {
+                                binary += String.fromCharCode.apply(null, content.subarray(i, i + chunkSize));
+                            }
+                            md5hash = MD5(binary).toLowerCase();
+                        });
+                        fwreader.readAsArrayBuffer(file);
+                        console.log("MD5:", md5hash);
+
                         let formData = new FormData();
+                        formData.append("md5", md5hash)
                         formData.append("file1", el.files[0]);
                         req.open("POST", apiPrefix + '/api/update?_hash=' + encodeURIComponent(hash));
                         req.send(formData);