readFloat

Signatures

• float SPIFlash::readFloat(uint32_t _addr, bool fastRead = false)
• float SPIFram::readFloat(uint32_t _addr, bool fastRead = false)

What It Is For

Read one float value from memory at a specific address.

Parameters

• _addr: Address to read from.
• fastRead: Optional faster read path where supported; validate on your hardware before enabling broadly.

Behavior Details

Reads raw bytes and decodes into float. Pair this with matching write APIs to avoid type interpretation errors.

Return Semantics

Returns decoded float value from memory.

Failure Behavior

If address is invalid or comms fail, returned value may be stale/default/invalid. Check error() after suspicious reads.

Common Mistakes

• Reading with wrong type/API compared to how data was written.
• Using out-of-range or stale addresses.
• Trusting suspicious values without checking error state.

Choosing Between Similar APIs

• Use this typed read only for data written with matching type/layout.
• Use readAnything() for struct reconstruction.
• Use array/string reads for variable-length payloads.

Example

float out = flash.readFloat(0);
Serial.println(out);