You Might Want to Try Again Later When Its Safe to Use Your Screen

This tutorial shows yous how to troubleshoot and ready a quadcopter that doesn't arm. I will besides explicate the common problems that prevent a mini quad from arming with Betaflight.

If you lot are completely new to Betaflight, check out my tutorials on how to setup information technology upwards for the starting time fourth dimension.

The first things to bank check

Here are the outset things you want to check when you are having trouble arming your quad:

• Radio receiver is bound and working correctly in Betaflight. Check in the receiver tab if the channels are responding to sticks motility in the right order and management (download the latest betaflight configurator)

• Check if you have assigned a switch on your radio for ARM mode, and if it can be activated by that switch. The arm mode should turn xanthous when activated, indicating that the switch is working
• As a safety characteristic in Betaflight, the motors won't spin up even when yous arm it if the flying controller is connected to the configurator. Remove USB connection and try again

If everything is proficient but you still can't arm the quad, then we will accept to look a bit deeper.

How to check for arming issue in Betaflight?

If you have Betaflight OSD, brand sure you lot display "Warnings" on your screen, and that "Arming Disabled" is selected. This will let you know what is stopping arming.

If you don't have Betaflight OSD, y'all tin besides cheque for the "Arming Disable Flag" in Betaflight. This will indicate the bug that are preventing you from arming.

There are multiple ways of checking for "Arming Disable Flag":

• Betaflight Configurator
• CLI
• Buzzer Beeping

Betaflight Configurator

If y'all have access to a calculator, yous tin can easily check the Arming Disable Flag in the Setup Tab in the Betaflight configurator.

CLI

Alternatively, y'all can check in the CLI by entering the control "condition". The last line of the condition info is arming prevention flags listing. This feature was made available afterwards Betaflight three.ii.

Further Reading: How to use CLI in Betaflight?

Buzzer Beeping

If you don't have admission to a estimator, simply yous do take a buzzer in your quad, the beeping should also indicate the reasons for the disabled arming. The beeping pattern tin can be broken downwards into:

• five short beeps for attention, which tin be ignored
• a number of long beeps
• a number of short beeps with long intervals

Each long beep represents 5, while each short beep represents one. The final flag number can exist calculated as 5 10 <the number of long beeps> + <the number of brusk beeps>.

For instance:

• 0 long beep and two brusk beeps = 2
• one long beep and iii short beeps = 8
• 2 long beeps + 0 short beeps = 10

Arming prevention flags lookup table

In one case you take constitute the arming disable flag numbers or names, you can look it up in the table below to see what they really mean. The table was taken from the Betaflight wiki page for our readers' convenience.

Name	Clarification	Beep lawmaking						Required Actions
		three.ii	iii.3	3.4/3.5	iv.0	4.ane	4.2+
NOGYRO	A gyro was not detected	1	ane	one	1	1	1	You may have a hardware failure, if a previous firmware version works then information technology may exist a firmware event.
FAILSAFE	Failsafe is active	2	2	2	2	2	2	Rectify the failure condition and try over again.
RXLOSS (1)	No valid receiver signal is detected	three	3	3	3	3	3	Your receiver is either faulty or has no link to the transmitter.
BADRX (1)	Your receiver has just recovered from receiver failsafe but the arm switch is on	4	4	iv	4	4	four	Switch the arm switch off.
BOXFAILSAFE	The 'FAILSAFE' switch was activated	5	five	5	5	five	v	SeeFAILSAFE
Runaway	Rail Takeoff Prevention has been triggered		6	six	6	vi	6	Disarm to clear this status.
CRASH	Crash Recovery has been triggered					7	7	Disarm to clear this condition.
THROTTLE	Throttle channel is too loftier	six	7	7	seven	8	8	Lower throttle beneathmin_check.
Angle	Craft is non level (enough)	vii	8	8	eight	9	ix	Level craft to withinsmall_angle degrees (default 25).
BOOTGRACE	Arming too before long subsequently power on	8	9	ix	10	10	ten	Wait untilpwr_on_arm_grace seconds (default five) have elapsed.
NOPREARM	Prearm switch is non activated or prearm has not been toggled afterward disarm	ix	10	10	10	xi	xi	Toggle the prearm switch.
LOAD	System load is too high for safe flight	10	xi	11	11	12	12	Revisit configuration and disable features.
CALIB	Sensor scale is however ongoing	11	12	12	12	xiii	13	Wait for sensor scale to complete.
CLI	CLI is active	12	13	13	13	xiv	14	Go out the CLI.
CMS	CMS (config carte du jour) is Active – over OSD or other display	thirteen	14	14	14	xv	15	Exit the CMS (or OSD card).
OSD	OSD menu is active	14	15	xvi				Exit OSD carte du jour.
BST	A Blackness Sheep Telemetry device (TBS Core Pro for example) disarmed and is preventing arming	xv	16	16	15	16	xvi	Refer to the manual for your hardware.
MSP	MSP connection is active, probably via Betaflight Configurator	16	17	17	16	17	17	End the Betaflight Configurator connexion (disconnect).
PARALYZE	Paralyze mode has been activated			eighteen	17	18	18	Power cycle/reset FC board.
GPS	GPS rescue mode is configured merely required number of satellites has not been fixed			nineteen	18	19	nineteen	Wait for GPS prepare or disable GPS rescue manner.
RESCUE_SW	GPS Rescue switch is in an unsafe position				19	20	20	Turn off the GPS Rescue switch to arm.
RPMFILTER (2)	Motor RPM-based filtering is not functioning				21	21	21	I or more ESC's are not supplying valid RPM telemetry.
REBOOT_REQD	Reboot required					22	22	Reboot the flight controller for settings changes to take effect.
DSHOT_BBANG	DSHOT Bitbang is non working					23	23	(3)
ACC_CALIB	Accelerometer calibration required						24	Calibrate the accelerometer or disable features that use it
ARMSWITCH	Arm switch is in an unsafe position	17	xviii	20	21	24	25	Toggle the arm switch to arm.

Other common problems that stop the quad from arming

If you don't get any arming disabled flag in Betaflight, and then the problem might exist something else. Attempt to go through the following check list.

Accelerometer Related

Mayhap your mini quad is not on a level plenty surface, or the ACC (accelerometer) is not calibrated. Calibrate ACC on a level surface first, if still no luck, try increasing "small_angle degrees" in CLI (default is 25).

Or but disable ACC if y'all don't wing Angle mode.

CPU Usage Too Loftier?

When CPU load is too high, the flying controller will just refuse to arm. Try to stay below 50% past lowering looptime, and disabling unnecessary features.

Throttle Related

Check if the lowest value in your throttle channel is too high, make sure the throttle stick is at its lowest position when attempting to arm. Ideally every aqueduct including throttle should have endpoints of 1000 and 2000. If they are non then you might desire to calibrate your radio endpoints first.

Betaflight doesn't arm if your minimum throttle is too high (higher than the setting "Min_Check"). This is a safety feature so that the quad doesn't suddenly spin upward the motors and hurt you lot when it'southward armed. You must ensure that your throttle is lower than min_check when it's in the lowest stick position. Min_check is set to 1050 by default, double cheque if information technology'due south non been inverse by mistake.

Moron threshold

Some FC might have more sensitive gyro's and the quad would reject to initialize afterward power upward, and therefore you tin't arm it. By increment Moron Threshold in CLI can reduce gyro sensitivity during initialization. Try setting it to 100 or even 120.

Conclusion

I promise that was helpful! Permit me know in the annotate if you had problem with arming that was caused by something else that wasn't covered in this tutorial. If y'all are still having bug arming your quad after following this guide, please postal service your question on our forum, I am more than happy to help.

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Source: https://oscarliang.com/quad-arming-issue-fix/

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