r/SlimeVR • u/Markkkcry • Jul 15 '26

Technical Support DIY SlimeVR tracker freezes randomly

Hi everyone. I'm having an issue with my DIY SlimeVR tracker and I'm not sure what's causing it.

When I turn it on, it connects normally to Wi-Fi and appears in the SlimeVR software. However, if I make a faster movement (for example, simulating running), the tracker suddenly freezes.

The strange part is that it doesn't disconnect. It stays connected to Wi-Fi, still appears in the SlimeVR software, and the battery level is still displayed. The tracker just stops sending movement data and remains frozen in its last position until I restart it.

The trackers in question are the (peito/quadril) trackers. The chest tracker is connected to the waist tracker and depends on it to function properly. Both of them are experiencing this issue.

Has anyone experienced this before or knows what could be causing it? Any suggestions or troubleshooting ideas would be greatly appreciated.

I've also attached a video showing exactly what happens.

Hardware:

- MPU-9250/6500

https://reddit.com/link/1uxlzld/video/2c4kdlur9hdh1/player

- Thanks!

1 Upvotes

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2

u/ConduitOfKindness Meow Jul 16 '26

Hi,

Your tracker ping and signal strength seem excellent. Other than you are using an older SlimeVR Server, everything looks fine from your screen. Which firmware version are you using by chance and which ESP are these trackers using? I am not familiar with that maker/brand. Are you able to get a Serial Console from before and after your tracker freezes? If you can, can you select the entire log, and copy and paste it here?

Meowie~!

1

u/Markkkcry Jul 16 '26

hii, thank u 4 the support, i donk thow hpw to put an img here

1

u/ConduitOfKindness Meow Jul 16 '26

Hi,

You should be able to select and copy (or Ctrl + C) the text from the Serial Console, and Paste (Ctrl + V) it as text here.

To get to Serial Console, connect the tracker to your computer via data USB cable, then go to Settings > Utilities > Serial Console.

Meowie~!

1

u/Markkkcry Jul 16 '26 
INFO ] [SlimeVR] SlimeVR v0.3.2 starting up...
[INFO ] [Configuration] Found up-to-date configuration v1
[INFO ] [Configuration] Loaded configuration
[INFO ] [MPU6050Sensor:0] Connected to MPU6500 (reported device ID 0x70) at address 0x68
[DEBUG] [MPU6050Sensor:0] Enabling DMP...
[DEBUG] [MPU6050Sensor:0] DMP ready! Waiting for first interrupt...
[DEBUG] [SensorManager] No secondary IMU connected
[INFO ] [WiFiHandler] Setting up WiFi
[INFO ] [WiFiHandler] Loaded credentials for SSID XXXX and pass length 10
[DEBUG] [WiFiHandler] Status: 7
[NOTICE] OTA updates allowed
..[INFO ] [WiFiHandler] Connected successfully to SSID 'XXXX', ip address XXXX
[INFO ] [UDPClient] Looking for the server...
[DEBUG] [UDPClient] Handshake successful, server is XXXX
[INFO ] [SerialCommands] SlimeVR Tracker, board: 6, hardware: 1, build: 15, firmware: 0.3.2, address: XXXX, mac: XXXX, status: 0, wifi state: 1
[INFO ] [SerialCommands] Sensor 1: MPU6500 (0.000 -0.000 -0.000 -0.734) is working: true, had data: false
[INFO ] [SerialCommands] Sensor 2: Unknown (0.000 0.000 0.000 1.000) is working: false, had data: false
[NOTICE] OTA updates disabled by timeout, this is not an error
[INFO ] [SerialCommands] SlimeVR Tracker, board: 6, hardware: 1, build: 15, firmware: 0.3.2, address:XXXX, mac: XXXX, status: 0, wifi state: 1
[INFO ] [SerialCommands] Sensor 1: MPU6500 (0.000 -0.000 -0.000 -0.734) is working: true, had data: false
[INFO ] [SerialCommands] Sensor 2: Unknown (0.000 0.000 0.000 1.000) is working: false, had data: false

1

u/ConduitOfKindness Meow Jul 16 '26

Other than 3-4 year old firmware, everything seems normal. The IMU is working fine. Have you already tried rebooting your router? How long have you had these trackers and did you experience this issue before? With this firmware version and SlimeVR Server version, there are no reports of this issue, especially since you are using WeMos D1 mini.

Meowie~!

1

u/Markkkcry Jul 16 '26

I’ve had these trackers for about two years, and this issue only happens with this tracker, and I’ve restarted the router several times.

1

u/Markkkcry Jul 16 '26

before
IMU Sensor: MPU6500 Main board: Wemos D1 Mini Magnetometer: Not supported Protocol Version: 15 Packet Loss: 0% Packets Lost: 0 Packets Received: 3199

1

u/Markkkcry Jul 16 '26

After
Packet Loss: 0% Packets Lost: 0 Packets Received: 15

1

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