Ok, I understand I can't put the characteristic I want in a random service.
I tried to follow the requirement for the heart rate service but I still have the same problem. It's says Unable to find the service with UUID 0x2A37.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Ok, I understand I can't put the characteristic I want in a random service.
I tried to follow the requirement for the heart rate service but I still have the same problem. It's says Unable to find the service with UUID 0x2A37.