Bullhorn RM520 and RM540: Not Communicating After Install

Use these checks when a Bullhorn RM520 or RM540 does not show up or does not send data after install.

Applies to: Bullhorn RM520C, RM520S, RM540C and RM540S.

Steps

1. Confirm the unit has a clear line of sight to the sky.
2. Check that the wiring cable terminal blocks are pressed fully onto the unit's pins, with no pins exposed, and that the wires are intact.
3. Swipe a magnet near the icon on the unit's label to wake it. Wait for the blue LED to turn off.
4. Swipe the magnet near the icon again. When the LED blinks, Bluetooth pairing mode is on.
5. Open the FieldPro app on your phone. If the unit is not listed, swipe down to refresh. Select the unit and tap OK.
6. On the Unit Info screen, wait until Signal Quality, Lat and Lon show valid values.
7. Open Test Message, turn on Auto Refresh, then tap Send Test Message.
8. Wait for "Transmission Successful". This can take several minutes, depending on signal quality, network traffic and satellite coverage.
9. If Signal Quality, Lat or Lon never show valid values, or the test message does not succeed, contact American Innovations Support.

Good to know

• Do the test message before you leave the site.
• A new unit ships in deep sleep. It will not communicate until you wake it with the magnet.
• The official RM520 and RM540 guides show these screens in Bullhorn Tools. Bullhorn Tools is retiring. Use FieldPro.