FoxESS Community - Owners & Installers Forum

Hi All having the message returned every time. I have looked a the responses on this forum and tried AI but no luck so far, any help appreciated

using ...

Source: /op/v1/device/real/query\\r\\n[MY TOKEN]\\r\\n1773829889976
Signature: 3fceb3662b6c15230c630a4558b91a2b
Full URL: + https://www.foxesscloud.com/op/v1/device/real/query
My Time:18 Mar 2026, 10:31:33

Status: HTTP Status: 200
Response: {"errno":40256,"msg":"Please close and reopen this page illegal signature"}
Server Time: Wed, 18 Mar 2026 10:31:33 GMT

headers being sent

socket.RequestHeader("token") = apiKey
socket.RequestHeader("lang") = "en"
socket.RequestHeader("timestamp") = timestamp
socket.RequestHeader("signature") = signature
socket.RequestHeader("user-agent") = "Mozilla/5.0 (Windows NT 10.0; Win64; x64)"

jsonString = {"sns":["60JC372045BM276"]}
RequestContent(jsonString, "application/json")

Do you know if you are calcuating the signature correctly?

Try adding a timezone and a Content-Type decleration into your header?

Hi
Thanks for the response, I've added

socket.RequestHeader("TimeZone") = "GMT"
socket.RequestHeader("Content-Type") = "application/json;charset=UTF-8"
socket.RequestHeader("Accept") = "application/json"

with no change to the error message.

what I'm using is

Source: /op/v1/device/real/query\\r\\n3ab34f91-77c5-4283-8688-b37b21276792\\r\\n1773855533625
Signature: be70bb9847936d65ca4c6457a2ababef

(ill change the token after getting is sorted)

Here's my debug data using your API key - this query body and header works and accesses your data:

getting real-time data
body = {"sns": ["60JC372045BM276"]}
path = /op/v1/device/real/query
headers = {'Token': '3ab34f91-77c5-4283-8688-b37b21276792', 'Lang': 'en', 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36', 'Timezone': 'Europe/London', 'Timestamp': '1773940778160', 'Content-Type': 'application/json', 'Signature': 'c661733a533c79b92c53a2b64adf2361'}

Copy this data and the headers and use the time stamp and other data to check that you are generating the correct signatue.

Many thanks that was a great help, after comparing my results compared to yours It was the signature that was wrong as you suspected.

I it turns out using '\\r\\n' not working for me whereas '\r\n' works fine so all is now good.

Thanks for the assist

No problem. Always tricky as it depends on the behaviour of your string parser. Most people don't realise the python example given for open API uses a raw string format that disables parsing.

You might want to generate a new API key as this one was posted here.

I get this same error in Home assistant when i enter "python3 foxess_control.py get" command in SSH terminal.

Followed instructions in this link:
https://github.com/Robbie1977/foxESS_HA_set_mode

When i modify foxess_control.py line 54 to "return url, payload, get_headers(path)".
The command returns the following:
[
"https://www.foxesscloud.com/op/v0/device/setting/get",
{
"sn": "60KE702047PCxxx",
"key": "WorkMode"
},
{
"Content-Type": "application/json",
"token": "xnxnxnxx-xxnn-nnxn-nxnx-xnxnxnxxnxnx",
"timestamp": "1776164630917",
"signature": "nnnxxnxnnxxnxxxxnxxnnnnnnnnnxnxn",
"lang": "en"
}
]

Any help much appreciated.