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+--- Forum: KC868-A32M (https://www.kincony.com/forum/forumdisplay.php?fid=49)
+--- Thread: KC868-A32M Using GPIO from 4G module for SPI / P9813 board (/showthread.php?tid=6500)
KC868-A32M Using GPIO from 4G module for SPI / P9813 board - giliardi - 08-28-2024
Hi,
I need to connect P9813 board, which uses serial interface, to A32M board.
I wondering if I could use the GPIO33 AND GPIO32, both from 4G A32M`s RX AND TX, to expose to SPI and configure Esphome like bellow:
spi:
clk_pin: GPIO33
mosi_pin: GPIO32
id: spi_a32m
light:
- platform: spi_led_strip
name: "P9813 RGB LED"
num_leds: 1
default_transition_length: 1s
spi_id: spi_a32m
Thanks in advance.
RE: KC868-A32M Using GPIO from 4G module for SPI / P9813 board - admin - 08-28-2024
SPI bus usually have 3 wires, MISO,MOSI,CLK. are you sure two pins is enough? i think you can confirm with your P9813 module's seller.
RE: KC868-A32M Using GPIO from 4G module for SPI / P9813 board - giliardi - 08-28-2024
P9813 has 4 pins:
VCC
GND
DIN - Digital Signal Input pin
CLK - Serial Clock Input pin
I think the correct config options are:
light:
- platform: fastled_spi
chipset: P9813
data_pin: GPIO33
clock_pin: GPIO32
num_leds: 1
rgb_order: BRG
name: "FastLED SPI Light"
RE: KC868-A32M Using GPIO from 4G module for SPI / P9813 board - admin - 08-28-2024
i am not sure this can work, i never see a SPI bus only have two wire.
But you can test, need practice, now i can't say whether can work.
RE: KC868-A32M Using GPIO from 4G module for SPI / P9813 board - giliardi - 08-28-2024
Can you confirm if I am using the pins on the A32M correctly? Also, could you indicate which physical pin on the 4G socket I should use to test?
RE: KC868-A32M Using GPIO from 4G module for SPI / P9813 board - admin - 08-28-2024
4G SIM7600 GSM module:
RXD:GPIO33
TXD:GPIO32
you can use these two pins, if you not need to use 4G module.