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Fleetwatch FMS · On-Board Hardware
How Do I Update the Firmware on a JX200-Pro?
The JX200-Pro is the on-board J1939 data logger. You can update its firmware two ways: from a Windows PC over a USB-C cable, or with a micro-SD card. Either way, you check the new version afterward with an MR-55.
| Method | You’ll need | Good for |
| 1. PC + USB-C | A Windows laptop, a USB-C cable, and the JX200Pro firmware folder | Updating a box with a laptop at the bus |
| 2. Micro-SD card | A blank micro-SD card formatted FAT32, and the same firmware folder (to prepare the card) | Updating without a laptop at the bus; one card can do many buses |
Before you start: get the JX200Pro firmware folder from Fleetwatch Support. It contains the TinyCLR Config folder, the JX200Pro_Key text file, the firmware file (*.GHI) and the application file (JX200Pro_v05xx.tca).
Know the Box
| A | USB-C PROG/CONFIG port, on the right side next to the Ethernet (RJ-45) port. Used in Method 1. |
| B | SD CARD slot, on the bottom edge. Used in Method 2. |
| C | 1939 CAN and power connectors (green plugs), on the bottom edge. |
Method 1: Update from a PC over USB-C
| 1 | Find the JX200-Pro box on the bus. |
| 2 | Unplug the 9-pin green screw-terminal connector from the box. |
| 3 | Connect a USB cable to the USB-C port (A), next to the Ethernet port. Plug the other end into your PC. |
| 4 | On the PC, open the JX200Pro firmware folder, then open the TinyCLR Config folder. |
| 5 | Run GHIElectronics.TinyCLR.Config.exe. The TinyCLR app opens. |
| 6 | Back in the firmware folder, open the JX200Pro_Key text file and copy the key. |
| 7 | In TinyCLR, under Device, choose port SC20260 and click Connect. The status turns green and says Connected. |
| 8 | Under Application, paste the key you copied in step 6. |
| 9 | Update the firmware first: click the … button, choose the *.GHI file, then click Update Firmware. |
| 10 | When the firmware finishes loading, reconnect: choose SC20260 in the port drop-down and click Connect again. |
| 11 | Then update the application: click the … button next to Update App, choose JX200Pro_v05xx.tca, then click Update App. |
| 12 | When the application finishes loading, click Disconnect. |
| 13 | Unplug the USB cable and plug the 9-pin connector back in. |
| 14 | Check the new version with an MR-55 (see Check the Version below). |
Method 2: Update with a Micro-SD Card
Prepare the card (on any PC):
| 1 | Insert a blank micro-SD card formatted FAT32 into your PC. |
| 2 | From the JX200Pro firmware folder, copy both the *.tca and *.ghi files to the root of the card (not inside a folder). |
| 3 | Rename the *.tca file to exactly update.tca. Leave the *.ghi file name as it is. The name must be exactly update.tca or the update won’t run. If Windows hides file extensions, turn on View > File name extensions in File Explorer so you don’t end up with update.tca.tca. |
Update the box (at the bus):
| 4 | Find the JX200-Pro box on the bus. |
| 5 | Unplug the 3-pin CAN bus connector and the 2-pin power connector (C). |
| 6 | Insert the micro-SD card into the SD CARD slot (B) on the side of the box, with the card’s contact pins facing up when you’re looking at the box label (see the photo above). |
| 7 | Plug the power connector back in. The green LED on the left side of the box comes on steady, then starts to flash while it updates. Don’t unplug power while it’s flashing. |
| 8 | Wait until the green LED goes back to solid on. That means the update is done. |
| 9 | Remove the SD card and plug the CAN bus connector back in. |
| 10 | Check the new version with an MR-55 (see below). |
Warning: don’t unplug power while the green LED is flashing. Cutting power in the middle of an update can leave the JX200-Pro unable to start.
Check the Version
Read the JX200-Pro with the MR-55. After the first read screen finishes filling in, press SEND. If the update worked, the JX-55 firmware version shows the version you just loaded.
Need the firmware folder, or the version didn’t change? Contact Fleetwatch Support.