---
tag: api
type: function
name: write
params:
- name: payload
  description: the bytes to write
  type: byte[]
- name: length
  description: the length of the payload to be sent
  type: unsigned int
returns:
  type: int
  values:
    - value: int
      description: the number of bytes written
---

Writes an array of bytes as a component of a publish started with a call to <code>beginPublish</code>.