Garmin releases regular software updates for the Edge 840 that fix crashes, add features like Garmin Share and road hazard alerts, and improve GPS accuracy on longer rides. The device checks for updates automatically over Wi-Fi or Bluetooth, but a surprising number of riders never see the prompt because their phone permissions or Wi-Fi settings quietly block it. I run an Edge 840 on my own gravel bike, and the update that added the improved climb-pacing feature only installed after I realized my Edge had been connected to a guest Wi-Fi network that blocked outbound firmware downloads.
Quick Reference
| Applies To | Garmin Edge 840 and Edge 840 Solar |
| Publisher | Garmin Ltd. |
| Current Version (at time of writing) | 31.30 (varies by region and beta enrollment) |
| Update Method | Garmin Express (computer), Garmin Connect app, or automatic Wi-Fi/Bluetooth check |
| Requirements | Battery above 25 percent recommended; stable Wi-Fi or paired phone connection |
Three Ways To Update The Edge 840
You have three practical options, and each suits a slightly different situation.
- Automatic Wi-Fi check — the simplest option once Wi-Fi is set up, but it depends on the network allowing the download.
- Garmin Connect mobile app — updates over Bluetooth through your phone, useful when you are away from a known Wi-Fi network.
- Garmin Express on a computer — the most reliable option, and the one to fall back on when the other two stall or fail repeatedly.
Updating With Garmin Express
- Install Garmin Express on your Windows or Mac computer.
- Connect the Edge 840 to the computer with the USB cable that came in the box.
- Open Garmin Express and let it detect the device — this can take up to a minute the first time.
- If an update is available, click Update Now and keep the cable connected until it finishes and the device reboots.
This method downloads the full firmware package directly rather than relying on the device’s own wireless radio, which makes it the fastest and most dependable option if your Edge has struggled to update over Wi-Fi before.
Updating With The Garmin Connect App
On your phone, open the Garmin Connect app, tap the device icon for your Edge 840, and check the Software Updates section. If an update is listed, tap Install and keep the Edge powered on and within Bluetooth range of your phone until it completes. This method is convenient when traveling, but it can be slower than Garmin Express for large updates since it transfers over Bluetooth rather than USB.
Checking manually from the device menu
You can also trigger a manual check without a phone or computer. Go to Settings > System > Software Update > Check for Update on the Edge itself, provided it is connected to a known Wi-Fi network. This is the quickest way to confirm whether the device sees an update at all before troubleshooting further.
Fixing An Update That Will Not Download Or Install
Most stuck updates trace back to one of a few causes rather than a genuine hardware fault.
- Guest or captive-portal Wi-Fi networks often block the background download silently, with no error shown on the device.
- Low battery below roughly 20 percent can cause the device to pause the install rather than risk an incomplete flash.
- An outdated Garmin Connect app on your phone can fail to hand off the update correctly — update the app itself first.
- A previous interrupted update can leave a partial file cached; a full restart (hold the power button until it shuts down, then turn it back on) often clears this.
If none of that works, connect the Edge 840 to Garmin Express on a computer instead of relying on wireless methods. USB updates rarely fail the way Wi-Fi or Bluetooth updates do, since there is no signal drop-out to worry about.
Per Elena V., who is a Triathlon Coach at an endurance sports club, “I tell every athlete I coach to plug their Edge into Garmin Express before a big event week. Wireless updates are convenient, but a USB update never leaves you wondering if it actually finished.”
Should You Join The Beta Software Program?
Garmin runs an open beta channel for the Edge 840 series that gets new features earlier, sometimes weeks or months before the public release. The trade-off is stability — beta builds occasionally introduce new bugs alongside the fixes. If you rely on your Edge 840 for racing or long unsupported rides where a crash mid-ride would be a real problem, stick with the stable public release. If you mainly ride locally and do not mind the occasional restart, the beta channel can be a good way to try upcoming features early.
Frequently Asked Questions
Will a software update delete my saved rides?
No, activity history is preserved through a normal update. It is still good practice to sync your rides to Garmin Connect before any major update just in case.
Why does my Edge 840 keep saying “Update Failed”?
This is most often a network interruption. Switch to a different Wi-Fi network, or update through Garmin Express over USB instead.
Can I revert to an older software version?
Garmin does not officially support downgrading Edge firmware, though enthusiast forums document unofficial workarounds. This is not recommended for most riders.
How do I know which software version I currently have?
Go to Settings > System > About on the device to see the installed software version number.
Does updating fix GPS accuracy problems?
Sometimes. Garmin regularly tunes GPS and multi-band GNSS performance in firmware updates, though persistent accuracy issues can also come from a cold start needing a clear sky view for the first few minutes.
Final Thoughts
Keeping the Edge 840 updated is worth the small effort, since Garmin regularly ships real bug fixes and navigation improvements rather than cosmetic changes. If wireless updates keep failing, do not fight with them for too long — Garmin Express over USB solves the vast majority of stuck-update cases in a few minutes. Check your Garmin support page for the Edge 840 if a specific update ever behaves unusually on your unit.
Ryan
Computer Science grad · long-time hands-on troubleshooter