cannot read (in central) the 2nd custom characteristic value defined within a custom service (of a peripheral)

RE: cannot read (in central) the 2nd custom characteristic value defined within a custom service (of a peripheral)

Abu — Sat, 14 Mar 2026 11:42:14 GMT

This looks like a classic BLE discovery issue. If the central device can read the first characteristic but not the second, it may be worth verifying that the second characteristic’s UUID is correctly registered and that the discovery process stores its handle before the read operation is attempted.

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RE: cannot read (in central) the 2nd custom characteristic value defined within a custom service (of a peripheral)

Abu — Sat, 14 Mar 2026 11:41:10 GMT

It sounds like the central device may only be discovering or caching the first characteristic handle from the service. Sometimes when multiple characteristics exist in the same custom service, the central implementation needs to explicitly search for each UUID during service discovery before attempting a read request.

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RE: cannot read (in central) the 2nd custom characteristic value defined within a custom service (of a peripheral)

Abu — Sat, 14 Mar 2026 11:40:16 GMT

This is an interesting technical issue. Working with multiple custom characteristics in the same BLE service can sometimes cause confusion if the UUIDs or handles are not referenced correctly on the central side. Often the problem is related to how the service discovery process stores the handles for each characteristic.

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RE: cannot read (in central) the 2nd custom characteristic value defined within a custom service (of a peripheral)

Robert White — Fri, 13 Feb 2026 05:55:34 GMT

I'd like to read the data from a specific characteristic of my remote BLE device to my Android tablet Nexus 7.

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