# ESC Mini 4 in 1 - params crc

Source: https://forum.modalai.com/topic/2672/esc-mini-4-in-1-params-crc
Category: ESCs, Sensors and Accessories (https://forum.modalai.com/category/15/escs-sensors-and-accessories)
Tags: esc
Posted: 2023-09-20 18:51:11 UTC by 0x45
Replies: 5 · Views: 978

## 0x45 · 2023-09-20 18:51:11 UTC

Hi,

I'm currently working setting up the VOXL ESC Mini 4-in-1 with Built-in Power Module (M0129). 

Following the steps on this link:
    https://docs.modalai.com/modal-esc-v2-manual/

I've updated the firmware using the binary found in:
    /voxl-esc/voxl-esc-tools/firmware/modalai_esc_firmware_m0129_3_v0_39_RC4_c0bf9200.bin

I've verified that worked with the voxl-esc-scan.py file

![Screenshot from 2023-09-20 11-33-15.png](https://forum.modalai.com/assets/uploads/files/1695235333821-screenshot-from-2023-09-20-11-33-15.png) 

**Problem:** 
    I uploaded the esc_params_generic_m0129.xml using voxl-esc-upload-params.py. Then I run a voxl-esc-verify-params.py and get the following output

![Screenshot from 2023-09-20 11-32-42.png](https://forum.modalai.com/assets/uploads/files/1695235616631-screenshot-from-2023-09-20-11-32-42.png) 

I haven't modified the parameters file and would like to know if the generic params is missing a parameter that needs to be updated? Also is there a source where the developers can see the necessary parameters needed to configure this esc board?

Let me know if there is other information you need from me to help troubleshoot.

Thanks

## Reply by 0x45 · 2023-09-22 18:38:35 UTC

Hi,

Just wanted to follow up if anyone was able to recreate this issue or can see something that might be off with my setup steps?

Thanks

## Reply by Alex Kushleyev (ModalAI staff) · 2023-09-23 02:23:24 UTC (in reply to 0x45)

@0x45 ,

Sorry about that. you caught a bug in our release candidate firmware. Please downgrade to firmware version 38, which you can find here : https://gitlab.com/voxl-public/voxl-sdk/utilities/voxl-esc/-/blob/v1.2.3/voxl-esc-tools/firmware/modalai_esc_firmware_m0129_3_v0_38_83faccfa.bin

You can just used `voxl-esc-upload-firmware-all.sh` script and point it to the v0_38 firmware.

The issue is only in the firmware sending back the params for verification, there should not be any other issue. There is no issue in the param file itself. we will fix ASAP.

Thank you

Alex

## Reply by Alex Kushleyev (ModalAI staff) · 2023-09-23 18:25:38 UTC (in reply to Alex Kushleyev)

The issue should be fixed now in the firmware version 39_RC5 : https://gitlab.com/voxl-public/voxl-sdk/utilities/voxl-esc/-/tree/dev/voxl-esc-tools/firmware/

You can either use the stable v38 firmware i mentioned before or update to 39_RC5 

Alex

## Reply by 0x45 · 2023-09-25 21:14:56 UTC (in reply to Alex Kushleyev)

@Alex-Kushleyev 

Appreciate all the help! I can confirm the new firmware verifies the parameters successfully. 

 ![Screenshot from 2023-09-25 14-13-00.png](https://forum.modalai.com/assets/uploads/files/1695676444974-screenshot-from-2023-09-25-14-13-00.png)

## Reply by Alex Kushleyev (ModalAI staff) · 2023-09-25 21:34:09 UTC (in reply to 0x45)

@0x45, Great to hear! Sorry again about the bug and thank you for reporting it.

Alex