​
heart_beat

DJI Services · drc · heart_beat

​
Request Params

​
vendor
string
required
Fixed value dji
​
device_id
string
required
Target device ID
​
command_type
string
required
Fixed value heart_beat
​
idempotency_key
string
required
Idempotency key; repeated requests return the same command
​
timeout_seconds
integer
Timeout in seconds, range 0~300
​
payload.seq
integer
required
Command sequence number
​
payload.timestamp
integer
required
Heart beat timestamp (milliseconds)

​
Create Response

​
command_id
string(uuid)
Platform command acceptance identifier; globally unique UUID
​
status
string
Acceptance status: ACCEPTED
​
accepted_at
string(datetime)
Command acceptance time (UTC)

​
Query Response

​
command_id
string(uuid)
Platform command acceptance identifier; globally unique UUID
​
status
string
Execution status: ACCEPTED / DELIVERED / SUCCEEDED / FAILED / TIMED_OUT / UNMATCHED_RESPONSE
​
vendor
string
Vendor identifier; fixed value dji
​
device_id
string
Target device ID
​
command_type
string
Method name
​
response_code
string
Device-side execution code
​
response_message
string
Device-side execution message
​
vendor_response
object
Raw vendor response (passthrough)

​
DJI Services Reply Mapping

The device returns command results through services_reply. The platform correlates the reply to command_id through tid and updates the command lifecycle. Clients do not consume the MQTT reply channel directly.
Open Platform fieldDJI services_reply source
response_codePrefer data.code; fall back to data.result when code is absent
response_messagedata.message / data.msg / data.description
vendor_responseNormalized DJI reply summary preserving result, code, message, output, and vendor extension fields
data.result = 0 means device-side execution succeeded. Non-zero values mean device-side execution failed, and the platform moves the command to a failed terminal state. 
curl -X POST "/api/v1/open/downlink/commands" \
  -H "Content-Type: application/json" \
  -H "X-Api-Id: YOUR_API_ID" \
  -H "X-Api-Timestamp: YOUR_UNIX_SECONDS" \
  -H "X-Api-Nonce: YOUR_NONCE" \
  -H "X-Api-Signature: YOUR_SIGNATURE" \
  -d '{"vendor":"dji","device_id":"drone-001","command_type":"heart_beat","payload":{"seq":0,"timestamp":0},"idempotency_key":"req-heart_beat-001","timeout_seconds":30}'

curl "/api/v1/open/downlink/commands/54bd6d2a-3dec-5005-8472-137d97c9fd33"

{
  "command_id": "54bd6d2a-3dec-5005-8472-137d97c9fd33",
  "status": "ACCEPTED",
  "accepted_at": "2026-04-22T12:00:00Z"
}