# API: Can't transmit IR commands except using use\_scan
**URL:** https://forum.bondhome.io/t/api-cant-transmit-ir-commands-except-using-use-scan/2912
**Category:** Uncategorized
**Created:** [December 19, 2021, 7:00am UTC](https://forum.bondhome.io/t/api-cant-transmit-ir-commands-except-using-use-scan/2912 "2021-12-19T07:00:45Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@prv](https://forum.bondhome.io/u/prv)
#### Post date: [December 19, 2021, 7:00am UTC](https://forum.bondhome.io/t/api-cant-transmit-ir-commands-except-using-use-scan/2912/1 "2021-12-19T07:00:45Z")
(Note: this is all using the API on a Bond Home running firmware v2.15.8.1)
When trying to send an IR command using the signal/tx API, I get a “frequency out of range” error.
```auto
curl [...]/v2/signal/tx -d '{
"freq": 38,
"modulation": "OOK",
"encoding": "hex",
"bps": 40000,
"reps": 1,
"data": [...]
}'
HTTP/1.1 400 Bad Request
Content-Length: 56
Content-Type: application/json; charset=utf-8
{
"_error_id": 30,
"_error_msg": "frequency out of range"
}
```
It seems like any frequency below 300000 returns this error. However, if I scan the same command + send using signal/tx with “use\_scan”: true, it works fine. It seems like there’s a validation error.
---
### Author:  [@merck](https://forum.bondhome.io/u/merck)
#### Post date: [December 28, 2021, 1:14pm UTC](https://forum.bondhome.io/t/api-cant-transmit-ir-commands-except-using-use-scan/2912/2 "2021-12-28T13:14:25Z")
I tried to repro this, but it works for me.
Testing on a unit (serial number starting with ZZ), version v2.28.0 firmware:
```auto
curl -iH "Bond-Token: 5exxxx52efb09a4a" http://192.168.86.225/v2/signal/tx -X PUT -d '{"freq":38,"modulation":"OOK","encoding":"hex","bps":40000,"reps":1,"data":"FF00FF00FF00"}
```
> HTTP/1.1 204 No Content
> Content-Length: 0
Looking at the source code, I don’t see why this wouldn’t work on v2.15.8.1. Anyways, you could upgrade to more recent firmware. If you have a “Snowbird” unit (serial number starting A or B) then you’ll need to use the “beta” firmware channel and be warned that there’s a chance of data loss with an upgrade of those Snowbird units.