From d559f3dde3a614be35c463c756e8bae43f0b1b78 Mon Sep 17 00:00:00 2001
From: Gordon Williams <gw@pur3.co.uk>
Date: Wed, 5 Feb 2020 10:52:51 +0000
Subject: [PATCH] Try to get time from GPS if we rebooted and powered on
 without any proper time - fix #91

---
 apps/boot/boot0.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/apps/boot/boot0.js b/apps/boot/boot0.js
index dbee62d9c..fb6fa128a 100644
--- a/apps/boot/boot0.js
+++ b/apps/boot/boot0.js
@@ -19,6 +19,22 @@ Bangle.setLCDTimeout(s.timeout);
 if (!s.timeout) Bangle.setLCDPower(1);
 E.setTimeZone(s.timezone);
 delete s;
+// check to see if our clock is wrong - if it is use GPS time
+if ((new Date()).getFullYear()==1970) {
+  console.log("Searching for GPS time");
+  Bangle.on('GPS',function cb(g) {
+    Bangle.setGPSPower(0);
+    Bangle.removeListener("GPS",cb);
+    if (!g.time || (g.time.getFullYear()<2000) ||
+       (g.time.getFullYear()==2250)) {
+      console.log("GPS receiver's time not set");
+      return;
+    }
+    setTime(g.time.getTime()/1000);
+    console.log("GPS time",g.time.toString());
+  });
+  Bangle.setGPSPower(1);
+}
 // All of this is just shim for older Bangles
 if (!Bangle.loadWidgets) {
   Bangle.loadWidgets = function(){