You can read more about SD SPI in the documentation. Let us now see how to interface an OLED Display with ESP32. ESP32 Pin out differ depending of the physical hardware. May 22, 2022 · Lesson01は、「ESP32-DevKitC-V4」の外観とピン配置です。ESP32を始める前に、ピン配置とピン機能の理解をしておきます。ESP32-DevKitCの最新版は32Eとなりますが、学習、遊びで使う場合は一つ前の32Dでもかまいません。さっそくデーターシートを読んで理解していきます。 A PDF showing a close up drawing for the DOIT ESP32 DEVKIT V1 with all of its pin outs identified 2. ESP32 allows GPIO multiplexing of the hardware SPI blocks, provided the pins are input-enabled or output-enabled as per the requirement of the SPI line. Nov 16, 2023 · Thank you @eric39es!That manual was a god send. 8. ADC1_CH0 - GPIO 36; ADC1_CH1 - GPIO 37; ADC1_CH2 Learn how to use the SPI Master driver to control ESP32's General Purpose SPI peripheral (s) when it functions as a master. RX - This is the UART Oct 25, 2023 · Due to limited pins, I had to put the SD card reader and the PN532 NFC reader on the same SPI lane. 2 PinOverview 14 2. read more⯈ ESP32 ADC Pins. int max_transfer_sz All available GPIO pins (except for the SPI bus for flash and PSRAM) are broken out to the pin headers on the board. The MTDI pin of ESP32, being among four pins used for JTAG communication, is also one of ESP32's bootstrapping pins. . I understand that these are internally connected to the flash. Change pin configuration in the Arduino IDE. These SPIs are the pins from GPIO26 to GPIO37. int quadhd_io_num¶ GPIO pin for HD (HolD) signal which is used as D3 in 4-bit communication modes, or -1 if not used. Additionally, these capacitive touch pins can be used to wake the ESP32 from deep sleep. Key Component. The pin configurations don't match HSPI or VSPI. For this reason, if I try to set them through the iomux to function as GPIOs, the MCU resets continuously. The SD card has an SPI mode, enabling it to function as an SPI device, but there are some restrictions that we need to pay attention to. There is not, however, very much explanation on how to actually do this (in layman's terms, anyway. Set the unused signals to -1. Ada yang di sebut VSPI dan ada juga yang di sebut HSPI. I2C. Untuk config pin nya bisa kita lihat pada tabel di bawah ini GPIO pin for spi data4 signal in octal mode, or -1 if not used. With the help of SPI Master Driver the SD SPI host driver based on, the SPI bus can be shared among SD cards and other SPI devices. Some ESP32 pins (0, 2, 4, 12-15, 25-27, 32-39) are connected to the RTC during deep-sleep and can be used to wake the device with the wake_on_ functions in the esp32 module. Each Device shares the MOSI, MISO and SCLK signals but is only active on the bus when the Host asserts the Device's individual CS line. The ESP32 S3 has four SPI interfaces which are: Sep 15, 2023 · ตัวอย่างการเชื่อมต่อด้วยบัส SPI สำหรับ ESP32#. If binary level on MDTI pin on power up is low, the voltage regulator is set to deliver 3. Make sure to set the correct I/O pins in the struct bus_config. Drivers can attach their devices to the bus with the arbitration of the lock. I have connected to the board an external ADC MCP3204 from Microchip which communicates over SPI with the ESP, pinout: GPIO39 SCK FSPI_SCK GPIO40 MISO FSPI_MISO GPIO41 MOSI FSPI_MOSI Jun 6, 2024 · Note that the pinout of both the 30-pin and the 36-pin versions of ESP32 Development Boards are very identical except for some pins at the bottom. int max_transfer_sz¶ Maximum transfer size, in Mar 1, 2024 · This makes the OLED Display Module to be connected to different boards like Arduino (with 5V logic) and ESP32 (with 3. As with I2C, you can bit-bang the SPI protocol on any GPIO pins with the bus. The SPI pins consist of MOSI (Master Out Slave In), MISO (Master In Slave Out), CLK (clock), and CS (Chip Select). You can now upload a sketch, and the configuration will change. ESP32 SPI APIs Initialisation. This step is essential to ensure proper communication and avoid potential damage to the board or connected components. You can find all the details for the default mapping in this file. int max_transfer_sz The ESP32-C3 chip features 22 physical GPIO pins (GPIO0 ~ GPIO21). 19 and 2. If i remember correctly 2 busses are available just like on other ESP32's but the default pins are not exposed, so you should define the pins yourself. Device. The ESP32 architecture includes the capability of configuring some peripherals to any of the GPIOs pins, managed by the IO MUX GPIO. Dec 6, 2023 · Not only are the SPI pins free assignable, but so are the UART pins. The SPI pins are on the ESP32-S3 high-speed peripheral. 0. GPIO Matrix and Pin Mux . RX - This is the UART Introduction. GPIO pin for spi data4 signal in octal mode, or -1 if not used. You can use the ESP32 to control I2C and SPI devices, sensors, outputs, etc. SPI0 and SPI1 are used internally to access the ESP32's attached flash memory. Any GPIO pin can be mapped to SPI signals through programmatic configuration. StefanL38: You should NOT use the IO-pins GPIO-1= Tx and GPIO-3=Rx that are used for the serial connection towards the computer at all. begin(115200); // Initialize serial communications with the PC while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based • StandardHCIbasedonSDIO/SPI/UART (ESP32-D0WDR2-V3,ESP32-U4WDH) 2 Pins 12 2. int data7_io_num¶ GPIO pin for spi data7 signal in octal mode, or -1 if not used. The ESP32 Technical Reference Manual is addressed to application developers. 8 SDA; There is an aditional I2C interface which does not seem to have default pins (wip). Apr 29, 2019 · Code: Select all #include <SPI. Esp32 chip has 48 pins with multiple functions. . In short, I'm looking for someone who can tell me how to use SPI on ESP32-S3. Take a look at the ESP32 Cheap Yellow Display (CYD) Pinout - ESP32-2432S028R. I2C can be used to connect up to 127 nodes via a bus that only requires two data wires, known as SDA and SCL. Aug 14, 2023 · However, there aren't standard pins. By default, ESP32 uses its SPI interface to access flash and PSRAM memory inside the module. Through GPIO matrix, IO MUX, and RTC IO MUX, peripheral input signals can be from any GPIO pin, and peripheral output signals can be routed to any GPIO pin. 4. First thing to understand is that the communication interface is SPI. Document Updates Oct 2, 2020 · Program di Atas menjelaskan bahwa pin SDA DS3231 di hubungkan ke pin GPIO16 dan Pin SCL DS3231 dihubungkan ke pin GPIO17. SPI is much simpler than I2C. SCL => D1; SPI. SPI Features SPI Master SPI Bus Lock To realize the multiplexing of different devices from different drivers, including SPI Master, SPI Flash, etc. 3 IOPins 17 VDD_SPI VDD3P3_CPU ESP32-C3FH4AZ 33 GND NC Figure2-2. ) Mar 20, 2021 · Assuming that you use the ESP32 Arduino Core, under the docs it is written that SPI is has a suppported Arduino API implementation. int max_transfer_sz May 24, 2022 · Does anyone know if the new C3-MINI has default pins for SPI and I2C? I can't seem to find it in the datasheet. The SparkFun ESP32 Thing is a comprehensive development platform for Espressif's ESP32, their super-charged version of the popular ESP8266. SD_MMC allows to use of 1, 4 or 8 data pins + 2 additional communication pins and 2 power pins. Mar 4, 2024 · I have a project with the ESP32-C3 chip, and I need to use the SPI pins (SPICS0, SPICLK, SPIQ, SPID) as GPIOs since I don't have any more available pins. But the code for setting custom pin settings I keep finding doesn't seem to work. GPIO interrupts allow the ESP32 to respond to external events Mar 30, 2023 · If you purchased the Sense version and need to connect to the expansion board, please note that the SD card on the expansion board will occupy the SPI pins, which may result in the SPI pins being unavailable. PIN SPI ESP32. The SPI Master driver will handle exclusive access from different tasks. I am using a custom developed board with the ESP32-S3-WROOM-1 module on it. Jul 17, 2022 · SPI instances and the APIs needed to interact with them will be covered. There is a lot more flexibility with the ESP32-S3, so most pins can be used for any peripheral. Each pin can be used as a general-purpose I/O, or be connected to an internal peripheral signal. The default mapping defines how the pins are configured on start up. The functionalities are defined in the SPI. 1 PinLayout 12 2. And just like SPI, you can define any other pins of the ESP32 as I2C, if required. The SPI hardware in the ESP32 doesn't normally let its lines float, so no pull-ups are needed there. To use ESP32's serial interface, remove the jumpers and connect another external serial device to the respective pins. It also supports the general-purpose SPI features listed below: 4 timing modes of the SPI format transfer; Up to 80 MHz and the divided clocks of 80 MHz SPI Features SPI Master SPI Bus Lock To realize the multiplexing of different devices from different drivers, including SPI Master, SPI Flash, etc. In the 36-Pin version, 6 GPIO pins (GPIO6 to GPIO11) are used for SPI Flash IC. SPID and SPIQ) but I eventually stumbled upon a wikipedia article on SPI and figured it out. This function has the following prototype Nov 2, 2023 · I think the ESP32-S3 has fixed SPI pins. 9 SCL; gpio. int quadwp_io_num¶ GPIO pin for WP (Write Protect) signal which is used as D2 in 4-bit communication modes, or -1 if not used. The ESP32 integrates two ADCs and supports measurements on 18 channels. ESP32-CAM SPI Pins. ตัวอย่างโค้ด Arduino Sketch สำหรับ ESP32 เพื่อสาธิตการรับส่งข้อมูลระหว่างบอร์ด ESP32 จำนวน 2 บอร์ด โดยบอร์ดหนึ่งทำ SD-SPI speed is approximately half of the SD-MMC even when used on 1-bit line. ESP32-C3FH4AZPinLayout(TopView) EspressifSystems 13 ESP32 Pin out. h and SD_MMC. ESP8266 has a more limited selection of pins that can be used; check the datasheet for more information. MOSI - This is the SPI Microcontroller Out / Sensor In pin. h library, under the SPIClass object. Users can program ESP32-S2 chip to enable multiple functions such as SPI, I2S, UART, I2C, touch sensors, PWM etc. ¶ SPI. So, look at the Pinout of ESP32 and identify the SPI Pins. First of all, INT isn't a pin that's defined in any SPI specs, so you should be able to route this to any GPIO pin you wish. For example, say we want to reuse some non-SPI pins to connect devices using the VSPI peripheral bus, we can override the defaults as shown The pins D0, D1, D2, D3, CMD and CLK are used internally for communication between ESP32 and SPI flash memory. Hence we can not use them. Thank you GPIO pin for spi data4 signal in octal mode, or -1 if not used. ESP32 UART Pins The ESP32 dev. Aug 18, 2023 · SPI Pins on the ESP32-S3 The ESP32 has four SPI interfaces: SPI0, SPI1, SPI2, and SPI3. Bus GPIO pin for spi data4 signal in octal mode, or -1 if not used. Mar 28, 2024 · Using an ESP32S3 Dev Kit board with the Arduino IDE 1. Analog Pins ESP32 PWM Pins. There are many questions about The SD card has an SPI mode, enabling it to function as an SPI device, but there are some restrictions that we need to pay attention to. I was trying some code for a LoRa device and not knowing what the FSPIW\\FSPIDQS (GPIO14) pin was on the pinout I used it for the LoRa devices TX_Enable pin. int data5_io_num GPIO pin for spi data5 signal in octal mode, or -1 if not used. The above image is a WROOM module with the pins labeled. int max_transfer_sz Apr 4, 2022 · Hi, I am trying to replicate the following project but I'm having trouble talking to the SD card. Discover the essential cheat sheet for the Arduino Nano ESP32, covering key functions and setup instructions. Essentially, this capability means that we can route the internal peripheral into a different physical pin using the IO MUX and the GPIO Matrix. The host driver relies on an interface (spi_flash_host_driver_t) defined in the spi_flash_types. These pins are the default pins, however they can be remapped to any other gpio. Like the 8266, the ESP32 is a WiFi-compatible microcontroller but adds nearly 30 I/O pins. Which pins are used to control the display, touchscreen, microSD card and available GPIOs While the ESP32 supports the reassignment of the default SPI pins to most other GPIO pins, using the dedicated SPI pins can improve performance and stability for certain ESP/device combinations. Choosing the Right Pins for ESP32 and WS2812B LED Strips. As for the pins you use and the switch configuration for your ESP32 industrial PLC: no switch configuration is required to use SPI communication. int max_transfer_sz The SPI controller peripheral inside ESP32-C3 that initiates SPI transmissions over the bus, and acts as an SPI Master. board has three UART interfaces, UART0, UART1, and UART2, that support asynchronous communication (RS232 and RS485) and IrDA at up to 5 Mbps. (Note: though arduino-esp32 still uses FSPI and ¶ Default Pins. Nano ESP32 Pin Map. int data7_io_num GPIO pin for spi data7 signal in octal mode, or -1 if not used. A transmit program would start, the USB port would disconnect and the program would run at 1/3rd normal speed. The solder pad interfaces provided on the Sense expansion board allow users to select the required functions. 2 Pins 12 2. e. ESP32-PICO-D4. SD_MMC is supported only by ESP32 and ESP32-S3 and can be connected only to dedicated pins. Clearly the FSPIW Jan 19, 2022 · Anyways you can always change the UART1 GPIO pins when needed. The SPI pins are on the ESP32-S2 high-speed peripheral. You can set any pins to be the low-speed peripheral but you won't get the speedy interface! SCK - This is the SPI clock pin. A PDF showing the connection between this ESP32 Module and the MSP2807, taken from this posting; a larger drawing of the ESP32 Module by itself; and a table summarizing the interconnections shown in your connection drawing at the top of this Nov 27, 2023 · Pins on an ESP32 are assignable for peripherals like SPI, but somehow the S2 is a bit different in naming the available SPI busses. 13 ESP32 Core. ¶ I2C. int max_transfer_sz SD Card module provides “micro-SD card socket”, for inserting the memory card and then provides SPI interface pins (MOSI = GPIO12, MISO = GPIO13, SCLK = GPIO14 and CS = GPIO27), for connecting it into ESP32 board. When working with ESP32 SPI, you would need to call spi_bus_initialize() first to configure SPI. In other files of the SPI HAL, some of these functions are implemented with existing ESP32 memory-spi functionalities. 1 documentation. You can set other pins as SPI pins. Not all the ESP32 development boards have all the pins exposed, and there are some unusable pins. Avoid using these pins, as it may disrupt access to the SPI flash memory/SPI RAM. What is common is the GPIO numbering. May 10, 2017 · I2C & SPI pins. SPI slave device. For SPI communication on the ESP32 you can use either the HSPI or VSPI pins It is important to note that the SPI bus should be initialized beforehand by spi_bus_initialize(). You will create a project that uses SPI to operate a MAX7219 module with an 8×8 LED matrix. RX - This is the UART Aug 10, 2021 · esp32-wroom-32eはspiはvspiとhspiが実装されています。ソフトウェアspiを使用する場合は任意のピンで動作させることができます Sep 8, 2021 · The sketch: /* The ESP32 has four SPi buses, however as of right now only two of * them are available to use, HSPI and VSPI. Simply using the SPI API * as illustrated in Arduino examples will use VSPI, leaving HSPI unused. The ESP32 board has 16 PWM channels controlled by a PWM controller. These pins aren't really used in the 1-bit SPI mode you'd normally use, but the 4-bit mode uses them as data lines. h libraries use the VSPI SPI pins (23, 19, 18, 5) by default. This caused problems. Each Device shares the MOSI, MISO and SCLK signals but is only active on the bus when the Host asserts the Device’s individual CS line. ESP32 has 4 SPI peripherals. a standard ESP32 has 3 UARTs and all can be assigned pins of your choosing. Driver Usage . I've ommitted some of the more esoteric pins names, but you can find the full list in the datasheet. Need help for resolving this issue. Please refer to arduino-esp32/variants for your board's default SPI pins. Dec 27, 2023 · Custom SPI Pins Configuration. I am trying to interface ADS1292 with ESP32 and log the output on microSD card. Its use in the Arduino environment is very similar to what we would find in a conventional Arduino. So I know the hardware works and it is possible. From what I can gather, spiq and spid correspond to miso and mosi, so from the datasheet, I see that the following corresponds: MISO = fspiq = io2 MOSI = fspid = io7 SCLK = fspiclk = io6 and a friend told me i2c are io4 and io5. I tried to change SS/CS PIN and obviously also changing it in the code to the function "Ethernet. , an SPI bus lock is applied on each SPI bus. Each bus lock is initialized with a BG (background) service registered. To understand how the Nano ESP32 board's pins correlates with the ESP32-S3 SoC pins, have a look at the pin map below: The SPI pins are on the ESP32-S3 high-speed peripheral. I have connected ADS1292 to pins 18,19,23,05 while microSD card is connected to 14,13,27,15 pins I can enable either of them at a time, but cant enable both simultaneously. 3V logic). int data6_io_num GPIO pin for spi data6 signal in octal mode, or -1 if not used. The ESP32-CAM features only one SPI (VSPI) in slave and master modes. int data5_io_num¶ GPIO pin for spi data5 signal in octal mode, or -1 if not used. It's not working. h (in the hal/include/hal folder). They are grouped on both sides near the USB connector. int max_transfer_sz¶ Mar 29, 2023 · Industrial Shields ESP32-based PLCs have an external SPI port, which connects to VSPI (SPI3). After hours of mucking around wondering why I couldn't get my ILI9488 TFT screen to work, it turns out that selecting "ESP32C3 Dev Module" (as shown in the manual) allowed my code to work and the SPI pins to run (I had selected some other board that I thought was close and it was clearly wrong. When setting up WS2812B LED strips with the ESP32 board, one crucial factor to consider is choosing the right GPIO pins. May 8, 2019 · I tried to use the RESET pin of the w5500 by connecting it to the EN PIN of the ESP32-S3-32S AI Thinker but it doesn't work. Wrt pull-ups and pull-downs: it depends. If using with Arduino, the standard Wire and SPI devices work as you'd For example, esp32's default SPI pins are found here (MOSI: 23, MISO: 19, SCK: 18, SS: 5). Here you can select between the default (Nano) and legacy (ESP32) options. The following SPI pins are directly available on the PLC: GPIO pin for Spi CLocK signal, or -1 if not used. The supported SPI buses are different from the ESP32 chip. h> #include <MFRC522. int max_transfer_sz Jan 6, 2024 · SPI Pins: The ESP32 supports SPI (Serial Peripheral Interface) communication. The ESP32 chip features 34 physical GPIO pins (GPIO0 ~ GPIO19, GPIO21 ~ GPIO23, GPIO25 ~ GPIO27, and GPIO32 ~ GPIO39). The loading consists of AC loading (pin capacitor) and DC loading (pull-ups). MISO - This is the SPI Microcontroller In / Sensor Out pin. ESP32 OLED Display Interface. Through GPIO matrix and IO MUX, peripheral input signals can be from any IO pins, and peripheral output signals can be routed to any IO pins. Writing the provided compiled code the Tiny Basic works and I am able to read and write to the SD card. AC Loading As mentioned in ESP32 pinout, the ESP32 has 2 internal I2C channels and also a default pair of pins for the I2C communication protocol. SPI. As we’re going to use I2C communication, the following lines that define the SPI pins are commented: /*#include <SPI. Description. The ESP32-S3 chip features 45 physical GPIO pins (GPIO0 ~ GPIO21 and GPIO26 ~ GPIO48). Use these pins to connect ESP32 to another SPI device. However, the maximum SPI clock frequency at multiplexed pins can be only 40 MHz. Initialize an SPI peripheral as a Device by calling the function spi_slave_initialize(). This interface provides some common functions to communicate with the chip. Bold indicates the default behaviour of each pin. h> #define BME_SCK 18 #define BME_MISO 19 #define BME_MOSI 23 #define BME_CS 5*/ Note: if you’re using SPI communication, you use the ESP32 SPI pins. The ESP32 features two SPI interfaces: HSPI and VSPI on the following pins: The SPI controller peripheral external to ESP32 that initiates SPI transmissions over the bus, and acts as an SPI Master. Nov 17, 2017 · Not sure about how Arduino controls SPI, but from a hardware PoV you're fine. The ESP32-C3 chip features 22 physical GPIO pins (GPIO0 ~ GPIO21). The manual provides detailed and complete information on how to use the ESP32 memory and peripherals. But there appear to be no SPID/MOSI and serial clock pins for the VSPI bus? There are only VSPI pins labeled "VSPIQ, VSPIWP, VSPIHD, and VSPICS0". Thus using the Arduino SPI API, it should work, like all other devices (the ESP32 Arduino Core implementation conforms to the API defined by Arduino, of course I would check if your board's pinout corresponds to the Espressif defined ESP32 pinout). If your code has hardcoded use for those pins, you'll want to replace them either by the new numbers or change the code to use the 'pretty' names like SDA or SCK. SPI slave device (general purpose SPI controller). Understanding GPIO Pins on ESP32 The pin numbers for the I2C port (SDA, SCL), hardware UART (RX, TX), and SPI (SCK, MOSI, MISO) have changed from the original Feather ESP32. Some posts ESP32-CAM, it connected to GPIO pins 2, 4, 12, 13, 14 and 15 according to 4-bit SD bus mode, so it can use all 4-bit / 1-bit SD bus mode and SPI bus mode TTGO T8 dev board, it connected to GPIO pins 2, 13, 14 and 15 according to 1-bit SD bus mode, so it can use 1-bit SD bus mode and SPI bus mode I have been experiencing a problem with an SPI bus and I can't figure it out. See the terminology, features, and configuration options for SPI transactions, buses, devices, and pins. Standard ESP32-PICO-D4 module soldered to the ESP32-PICO-KIT board. Using RFID and SD card Reader at the same time with SPI and The ESP32 is a versatile microcontroller with extensive functionalities. The SD. 2 PinOverview 14 By default, these pairs of pins are connected with jumpers. h> #define MISO_PIN 12 #define MOSI_PIN 13 #define SCK_PIN 14 #define SS_PIN 15 #define RST_PIN 16 MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance void setup() { delay(2000); Serial. For pin definition, electrical characteristics, and package information, please see ESP32Datasheet. Please note that there may be a restriction to use FSPI for your SPI bus. So refer to the documentation of your specific board to find out the physical relation. Owing to the versatile GPIO matrix in ESP32, we are not limited to just the default SPI pinout. ESP32 memiliki banyak SPI. SPI0 is used to connect to the FLASH memory, and SPI1 to PSRAM (if the board has it). I was initially confused by the odd naming scheme (i. May 16, 2024 · This article on Esp32 pinout reference gives a complete idea about the pinout configuration, the function assigned to pins, what gpio pins we can use. Its pinout includes GPIO pins for digital, analog, and capacitive touch, PWM pins for precise control, I2C pins for communication with compatible devices, SPI pins for high-speed serial communication, and UART pins for asynchronous serial communication. SDA => D2. Pin Loading of Other Devices When adding more devices onto the same bus, the overall pin loading increases. The UART interface. I agree that the documentation can be slightly better wrt explaining this. Aug 25, 2023 · The ESP32, ESP32-S2, and ESP32-S3 have four SPI controllers, while the ESP32-C3 has three. The pins D0, D1, D2, D3, CMD and CLK are used internally for communication between ESP32 and SPI flash memory. The output-capable RTC pins (all except 34-39) will also retain their pull-up or pull-down resistor configuration when entering deep-sleep. The default I2C pins of ESP32 are as follows: SDA (GPIO 21) SCL (GPIO 22) May 20, 2017 · Hello! There is a lot of talk all over the place about the ESP-32's ability to re-map it's internal peripherals to different pins. ESP32 SPI Interphase. Bus spi_hd is the hold pin pf the flash chip, while spi_wp is for write protect. init(x);" but it does not work. AC Loading Apr 12, 2024 · 1. Aug 18, 2023 · For example, to restart the ESP32. The complete ESP32 system on a chip (ESP32 SoC) has been integrated into the SiP module, requiring only an external antenna with LC matching network, decoupling capacitors, and a pull-up resistor for EN signals to function properly. An SPI bus may be connected to one or more Devices. Default pins are: gpio. int data6_io_num¶ GPIO pin for spi data6 signal in octal mode, or -1 if not used. begin(CLK_PIN, MISO_PIN, MOSI_PIN, SS_PIN); command. see the espressif document: "GPIO & RTC GPIO - ESP32-S3 - — ESP-IDF Programming Guide v4. On power up ESP32 is sampling binary level on MTDI to set it's internal voltage regulator used to supply power to external SPI flash chip. GPIO10, 11 and 12 pins do not appear to be part of this processor's SPI. The PWM output can be used to control motors and digital LEDs. They are SPIO0, SPIO1, SPIO2 and, SPIO3. Mar 12, 2021 · Use Custom SPI Pins with the MicroSD Card. xt gt ey da qw us gx la zs tz