NeoPixel + Pixhawk 2.4.8

ArduCopter Copter 4.0
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1

Hi
I try to handle WS2812 Led by Pixhawk 2.4.8.
I have arducopter 4.2.3 (Pixhawk1-1M firmware from Mission Planner)

pixhawk
pixhawk1150×758 122 KB

I use 4 ESC on 1-4 main outputs, FrSky telemetry(serial4), external GPS+compass in default configuration - everything works fine.
But I try to connect NeoPixel led to pixhawk because I want have Led notification during flight but it doesn’t work.
I connected diode to AUX1 (servo9) and set options like below:
servo9

ntf
ntf693×478 13.9 KB

servo_gpio_mask

Led has external 5V power supply, and is connected to pixhawk with GND and SIGNAL.
scheme_pixhawk+WS2812

I’d also read this thread:
WS2812B (NeoPixel) Integration - ArduCopter / Copter 4.0 - ArduPilot Discourse

and I saw that some people had message like this:

25/03/2020 12:36:13 : RCOut: PWM:1-8 NeoP:9-12 PWM:13-14

but i have only: (without “NeoP”)

30.09.2022 20:45:36 : Frame: QUAD/X
30.09.2022 20:45:36 : IMU0: fast sampling enabled 8.0kHz/1.0kHz
30.09.2022 20:45:36 : RCOut: PWM:1-8 PWM:10-14
30.09.2022 20:45:36 : Pixhawk1-1M 00240020 31385119 39393931
30.09.2022 20:45:36 : ChibiOS: 38022f4f
30.09.2022 20:45:36 : ArduCopter V4.2.3 (a480c0a7)

I’m sure that WS2812 is okay because I connected it to Arduino and it works fine.
Can You advice me guys what I’m doing wrong? Did I chose wrong firmware?

1 Like
2

Yes, as I told you in the other thread. The correct firmware for those 2.4.8’s is Pixhawk1 not Pixhawk-1-1M which is feature limited.

1 Like
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Hi, Thank You for Help Dave (dkemxr). I uploaded Pixhawk1 firmware, but it still doesn’t work.
Still don’t have in massages “NeoP” configuration on outputs. Any other tips?
BR
Rafal

1 Like
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I have a actual Pixhawk1-1M in the junk drawer and it configures Neopixel. SERVO9_FUNCTION to 120 NFT_LED_TYPES check the Neopixel box (it’s at 257). No other changes. You can see due to the shared timers it will configure 9-12 so if you want to use 9 you can’t configure anything else on those. You don’t need the Servo GPIO mask perhaps it’s the reason it’s not working.
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Neopixel
Neopixel771×1430 221 KB

2 Likes
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Very, very thank You Dave, it’s work!
You’re really help me.
Also work with Internal Toshiba LED.

IMG-20221003-WA0001
IMG-20221003-WA00011536×2048 242 KB

Can You also explain why we shouldn’t use servo_gpio_mask in this case?

I hope that will be very helpful thread for others.
Thanks again.

6

A GPIO configured output is not what you want for Neopixel. That’s appropriate for driving relays or analog inputs.