Here is a list of all documented variables with links to the struct/union documentation for each field:

A

B

C

D

E

F

G

H

I

K

L

M

N

O

P

Q

R

S

T

U

V

W

_

- h -

• header : Ack, Connack, Connect, MQTTPacket, Publish, Suback, Unsuback
• heap_tracking : Tree
• httpHeaders : MQTTAsync_connectOptions, MQTTClient_connectOptions
• httpProxy : Clients, MQTTAsync_connectOptions, MQTTClient_connectOptions
• httpsProxy : Clients, MQTTAsync_connectOptions, MQTTClient_connectOptions