Inkbird ibs-p01r

I have had this sensor for 4 months and all has been well.
The screen on the pool thermometer has now highlighted all the individuals characters (See photo) and is not communicating with the receiver.

I have changed batteries in both u


nits.
Any suggestions from this forum ?

Hello,
Please provide your order information, and this picture to email support@inkbird.com for after-sales service.
Since forum posts are public, these may involve private information, please do not reply here.
Thanks.