APD ESC and Jeti telemetry

[gamingthemarket]

I have an APD F120X ESC and Jeti radio and ATmega328. I want to decode the telem using PWM over a single wire. Can you help me with this diagram? I'm not sure about 5V and ground lines. Thanks kindly!

[dgatf]

• telemetry does not need ground
• 5v is ok
• pwm? You meant serial telemetry, don't you?
• jeti goes to pins 7&12 if using ESC with serial telemetry
• esc serial telemetry goes to rx1

[gamingthemarket]

You are defining the ESC T output (telemetry) signal as serial? Just to clarify, APD F series only use UART as input for firmware. I'll try the other pins. Thanks for a fast response !

[gamingthemarket]

Also, I have read some people use an opto isolator, but I'm not sure if it's necessary on the APD F120X. My max load to the ESC is 150 amps and 35V.

[dgatf]

With Beta firmware it is feasible to send also full serial telemetry.

Depending on telemetry type, pins varies:

• RPM output (PWM signal). Jeti to pins Rx and Tx. PWM signal to pin 8
• Serial telemetry. Jeti to pins 7 and 12. Serial telemetry to pin Rx

[gamingthemarket]

I'm not using DShot. I set the Telemetry to PWM in the APD config. Does Rx1 need a resistor?

[dgatf]

RPM output (PWM signal). Jeti to pins Rx and Tx. PWM signal to pin 8

It is highly recommended 1k resistor at Tx. Though it will work without it

[dgatf]

• Remove GND and RAW cables from UART and replace with cables from Vin and GND
• Resistor is on pin TX0, not RX1
• PWM is on pin8 without resistor

El sáb, 5 mar 2022 a las 7:55, gamingthemarket @.***>) escribió:

Ok we're getting closer. Does Rx1 need a resistor? [image: APD ATmega] https://user-images.githubusercontent.com/100990220/156883990-54fda99b-4977-49ee-879d-bf4efdafb93b.png

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[gamingthemarket]

Still no signal but I flashed the card wrong by only uploading the config.h. Will report back!

My config.h:

ifndef CONFIG_H

define CONFIG_H

include "constants.h"

define RX_PROTOCOL RX_JETIEX

define CONFIG_ESC_PROTOCOL PROTOCOL_PWM

define CONFIG_GPS false

define GPS_BAUD_RATE 9600

define CONFIG_VOLTAGE1 true

define CONFIG_VOLTAGE2 false

define CONFIG_NTC1 true

define CONFIG_NTC2 false

define CONFIG_CURRENT true

define CONFIG_AIRSPEED false

define CONFIG_REFRESH_RPM 1

define CONFIG_REFRESH_VOLT 1

define CONFIG_REFRESH_CURR 1

define CONFIG_REFRESH_TEMP 1

define CONFIG_REFRESH_DEF 1

define CONFIG_AVERAGING_ELEMENTS_RPM 1

define CONFIG_AVERAGING_ELEMENTS_VOLT 1

define CONFIG_AVERAGING_ELEMENTS_CURR 1

define CONFIG_AVERAGING_ELEMENTS_TEMP 1

define CONFIG_AVERAGING_ELEMENTS_DEF 1

define VOLTAGE1_MULTIPLIER 1

define CURRENT_MULTIPLIER 1

define CONFIG_PWMOUT false

define PWMOUT_DUTY 0.5 // 0.5 = 50%

define SENSOR_ID 10 // Sensor Id

define DATA_ID 0x5000 // DataId (sensor type)

define CURRENT_THRESHOLD 25

[gamingthemarket]

APD F telemetry is PWM -> pin 8. Jeti Ex Bus output -> Tx. Wiring is the same as my prior post. I got the IDE upload working w/ the full library and config.h.

I tried this version: RX_PROTOCOL RX_JETIEX CONFIG_ESC_PROTOCOL PROTOCOL_APD_F

Also tried: RX_PROTOCOL RX_JETIEX CONFIG_ESC_PROTOCOL PROTOCOL_PWM

Jeti radio -> Apps -> Jetibox Emulator = no connection to MX for telemetry. Am I missing something?

[dgatf]

CONFIG_ESC_PROTOCOL PROTOCOL_PWM

This is the correct protocol for telemetry as RPM signal. Moreover, if you select PROTOCOL_APD_F, then Jeti would go other pins

You'll need to enter in debug mode

Change line 77 in constants.h to:

#define DEBUG_SERIAL softSerial

Connect arduino GND to programmer GND and arduino pin 12 to programmer Rx

Enable DEBUG_PWM in config.h and post output with serial monitor at 115200

Disable DEBUG_PWM and enable DEBUG_PACKET and post output

[gamingthemarket]

The ESC is faulty has to be replaced. I am going to table this project. Thanks for working with me amigo, and helping to push the hobby in a good direction.

[dgatf]

You're welcome