2 - Sending Messages
Messages sent from an end device to a network server via one or more nearby gateways are referred to as uplinks.
In this book, you learn the rules and best practices to follow when sending uplinks from your end device using the LoRaWAN® 1.0.4 specification.
Sending MAC Commands
Class B - Ping Slot Channel Configuration Answer (PingSlotChannelAns)
The end device sends the PingSlotChannelAns in response to the PingSlotChannelReq command. The PingSlotChannelReq command is sent by the network server to request a modification of the frequency and data rate of the channel on which the end device expects to receive Class B downlink pings. Read how to send the PingSlotChannelAns in the section Handle Requests to Update Downlink Frequency and Data Rate of the Class B Book.