DJI Agras T100 Operation Resumption & Empty-Tank Recovery
Interrupted spraying operations have their own operational logic. A refill stop, battery change, obstacle avoidance maneuver or temporary pause should not force the operator to rebuild the entire field task. The DJI Agras T100 Operation Resumption system records a breakpoint and provides controlled ways to return to the route, while the Empty Tank function estimates where material will run out and helps the operator continue after refilling.
Quick Answer: During Route or Fruit Tree operations, the T100 can record a breakpoint when the operation is paused or exited under suitable GNSS conditions. After refilling, changing the battery or manually avoiding an obstacle, select the breakpoint or an allowed return point and tap Resume. The aircraft returns automatically and continues the task. Smart Resume can choose a more efficient return point in supported cases. For empty-tank events, DJI Agras can display a predicted empty-tank point; when the tank empties, sprinklers stop, the operator lands and refills, then continues the operation.
What counts as an operation interruption?
DJI specifically describes Operation Resumption for Route and Fruit Tree operations. Common reasons to pause include refilling the spray tank, changing the flight battery and manually avoiding obstacles. The system is designed to preserve the task’s progress so the aircraft can return to an appropriate point rather than restarting the entire route.
Breakpoint recording depends on positioning
When the operator exits a task with strong GNSS and the required conditions are met, the aircraft records its current location as a breakpoint. If GNSS becomes weak and the aircraft enters Attitude mode, the current automatic operation exits and the last position with strong GNSS can become the recorded breakpoint.
This makes the breakpoint a positioning-dependent task record. If the operator sees abnormal GNSS or RTK behavior at the same time as an interrupted task, diagnose the positioning condition before assuming the resume function itself has failed.
Basic Operation Resumption procedure
- Pause or exit the task under conditions that allow the aircraft to record a breakpoint.
- Fly or move the aircraft to a safe location for the required action, such as battery replacement or tank refill.
- When ready to return, select the breakpoint or an available return point in DJI Agras.
- Tap Resume.
- The aircraft returns automatically to the selected point and continues the operation.
How Connection Points affect the return
If Connection Points were added before the operation, the aircraft can return to the breakpoint through those points after Resume is selected. If the operation was ended in a way that removes the existing connection-point context, the operator may need to add new Connection Points before performing the operation again.
Connection Points are therefore not just a planning convenience. They can directly affect how the aircraft travels back to the active route after a stop.
What happens if the return path contains an obstacle?
While returning to a breakpoint or return point, the aircraft can attempt to bypass a detected obstacle or decelerate and hover. If it hovers because automatic bypass cannot complete, the pilot must manually control the aircraft and then resume from a suitable point.
Smart Resume
Smart Resume is intended to reduce unnecessary return distance, particularly when the aircraft is carrying a heavy payload. The manual describes Smart Resume becoming available in supported Route/Fruit Tree situations such as after pausing and landing or restarting an in-progress operation. DJI Agras calculates an appropriate return point using the breakpoint and aircraft location.
The feature can be enabled before starting the task and can also be controlled from the operation interface after landing.
Manual obstacle avoidance during an automatic task
If the T100 cannot automatically bypass an obstacle, the operator can leave the automatic route, maneuver around the obstacle manually and then return to one of the available resume points.
The manual’s diagram labels a breakpoint, manual detour and several possible return points. The key rule is not to resume until the aircraft has completely cleared the obstacle. If another abnormal condition occurs while returning, repeat the safe-pause/manual-control logic rather than forcing the aircraft back onto the route.
Empty Tank Warning: predicted empty point
The T100 can calculate where the spray tank is expected to become empty and display that point on the map. The predicted empty point updates dynamically when the operator adds liquid or changes operation parameters.
If the route is expected to finish before the tank empties, the app may not display an empty point. The operator can configure the action the aircraft should take when the empty-tank point is reached.
Empty-tank recovery workflow
- Enable the Empty Tank Point display and choose the desired empty-tank action in DJI Agras.
- When the empty-tank warning appears, the sprinklers stop automatically.
- Land the aircraft and stop the motors.
- Refill the spray tank and secure the tank cover.
- Select the appropriate operation mode and continue the task using the resumption workflow.
Resume decision table
| Interruption | Primary action | Resume consideration |
|---|---|---|
| Battery change | Land safely, power down and replace battery | Use the recorded breakpoint/Smart Resume after the aircraft is ready again. |
| Tank refill | Land, stop motors, refill and secure the cover | Resume from the appropriate return point rather than restarting the whole field. |
| Obstacle not auto-bypassed | Pause and manually clear the obstacle | Do not resume until the aircraft is completely beyond the obstacle. |
| Weak GNSS / Attitude mode | Prioritize aircraft control and positioning recovery | The last strong-GNSS position may become the breakpoint; do not treat this as a normal resume-only issue. |
| Operation ended/recalled | Review task and connection-point state | Some connection-point context may need to be recreated before the next run. |
Common mistakes
Resuming toward an obstacle before fully clearing it
The operator should make sure the aircraft has completely avoided the obstacle before selecting Resume.
Assuming every interruption creates a valid breakpoint
Breakpoint recording depends on positioning conditions and the way the task was exited.
Forgetting that Connection Points influence the resume route
A correct breakpoint can still be reached through an undesirable transit route if connection planning is poor.
Refilling with the motors still running
The manual’s empty-tank workflow lands the aircraft and stops the motors before refill.
Frequently asked questions
Can the T100 resume a Route operation after a battery change?
Yes. Battery replacement is one of the explicit use cases for Operation Resumption.
What is a breakpoint?
It is the recorded task position used to preserve operation progress when the route is paused or exited under supported conditions.
What is Smart Resume?
It is a feature that calculates an efficient return point using the breakpoint and current aircraft location, reducing unnecessary travel in supported Route/Fruit Tree situations.
What if the aircraft finds an obstacle while returning to the breakpoint?
It can attempt to bypass or hover. If it hovers, the operator should manually avoid the obstacle and then resume.
Does the T100 predict where the tank will run out?
Yes. DJI Agras can calculate and display an Empty Tank Point when the tank is expected to empty before the task finishes.
Related T100 guides
Source and revision note
Primary source: DJI AGRAS T100 User Manual v1.0 (2025.11), pp. 55–58. This guide isolates resume, breakpoint, Smart Resume, manual obstacle detour and empty-tank intent so operators can find interrupted-operation answers without searching the entire spraying chapter.
