Protocol translation at edge in IOT Protocols - Step-by-Step Execution

Process Flow - Protocol translation at edge

Device sends data in Protocol A

↓

Edge device receives Protocol A message

↓

Edge device translates Protocol A to Protocol B

↓

Edge device sends data in Protocol B

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Cloud or server receives Protocol B message

Data flows from a device using one protocol to an edge device that converts it to another protocol before sending it to the cloud.

Execution Sample

IOT Protocols

message = receive_message(protocol='MQTT')
translated = translate_to('CoAP', message)
send_message(protocol='CoAP', message=translated)

Edge device receives MQTT message, translates it to CoAP, then sends it onward.

Process Table

Step	Action	Input Protocol	Output Protocol	Result
1	Receive message	MQTT	MQTT	Message received from device
2	Translate message	MQTT	CoAP	Message converted to CoAP format
3	Send message	CoAP	CoAP	Message sent to cloud/server
4	End	-	-	No more messages to process

💡 No more messages to process, translation cycle ends

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3
message_protocol	None	MQTT	CoAP	CoAP
message_content	None	Raw MQTT data	Converted CoAP data	Sent CoAP data

Key Moments - 2 Insights

Why does the edge device need to translate the protocol?

Because the device and the cloud use different protocols, the edge device converts the message format so both sides can understand each other, as shown in step 2 of the execution table.

What happens if the translation step is skipped?

The cloud would receive a message in the wrong protocol and likely fail to process it, so the translation step (step 2) is essential for communication.

Visual Quiz - 3 Questions

Look at the execution table, what protocol is the message in after step 2?

A MQTT

B HTTP

C CoAP

D None

💡 Hint

Check the 'Output Protocol' column for step 2 in the execution table.

At which step does the edge device send the message to the cloud?

A Step 3

B Step 2

C Step 1

D Step 4

💡 Hint

Look for the action 'Send message' in the execution table.

If the input protocol was changed to HTTP, which step would change in the execution table?

A Step 1 only

B Steps 1 and 2

C Step 2 only

D No steps would change

💡 Hint

Step 1 input protocol and step 2 translation input depend on the device protocol.

Concept Snapshot

Protocol translation at edge:
- Edge device receives data in one protocol (e.g., MQTT)
- Translates data to another protocol (e.g., CoAP)
- Sends translated data to cloud/server
- Enables devices and cloud to communicate despite protocol differences

Full Transcript

Protocol translation at edge means that an edge device receives data from a device using one communication protocol, converts that data into another protocol, and then sends it to the cloud or server. This process allows devices that speak different protocols to communicate smoothly. The edge device acts like a translator, receiving messages in one format and sending them in another. The execution steps show receiving a message in MQTT, translating it to CoAP, and sending it onward. Variables track the message protocol and content as they change through each step. This translation is essential because without it, the cloud would not understand the device's messages.