[Board]: XIAOWOW!

[madeofstown]

SOC

NRF52, ESP32

Lora IC

Ebyte E22-900M30S

Product Link

https://oshwlab.com/jljohnson87/xiaowow

Description

XiaoWow is a DIY, open-source hardware, communications radio designed for Meshtastic utilizing a Seeed Xiao (nRF52840 or ESP32S3) and an Ebyte E22-900M30S 1 watt LoRa radio module.

It is available as a project on OSHWlab and the boards can easily be manufactured and assembled by JLCPCB.

[madeofstown]

Currently waiting for #5421 to get merged so I can test with Xiao C6.

[pepefrog1234]

Hello, I printed the board in jlc according to your layout, but I encountered the problem that the e22 module can't be found, which side of my setting is wrong?

`ifndef SEEED_XIAO_NRF52840_SENSE_H
#define SEEED_XIAO_NRF52840_SENSE_H

/** Master clock frequency */
#define VARIANT_MCK (64000000ul)

#define USE_LFXO // Board uses 32khz crystal for LF
// #define USE_LFRC // Board uses RC for LF

/*----------------------------------------------------------------------------

•    Headers
  

----------------------------------------------------------------------------/

#include "WVariant.h"

#ifdef __cplusplus
extern "C" {
#endif // __cplusplus

#define PINS_COUNT (33)
#define NUM_DIGITAL_PINS (33)
#define NUM_ANALOG_INPUTS (8) // A6 is used for battery, A7 is analog reference
#define NUM_ANALOG_OUTPUTS (0)

// LEDs

#define LED_RED 11
#define LED_BLUE 12
#define LED_GREEN 13

#define PIN_LED1 LED_GREEN
#define PIN_LED2 LED_BLUE
#define PIN_LED3 LED_RED

#define PIN_LED PIN_LED1
#define LED_PWR (PINS_COUNT)

#define LED_BUILTIN PIN_LED

#define LED_STATE_ON 1 // State when LED is lit

/*

• Buttons
  */
  #define PIN_BUTTON1 (PINS_COUNT)

// Digital PINs
#define D0 (0ul)
#define D1 (1ul)
#define D2 (2ul)
#define D3 (3ul)
#define D4 (4ul)
#define D5 (5ul)
#define D6 (6ul)
#define D7 (7ul)
#define D8 (8ul)
#define D9 (9ul)
#define D10 (10ul)

/*

• Analog pins
  */
  #define PIN_A0 (0)
  #define PIN_A1 (1)
  #define PIN_A2 (2)
  #define PIN_A3 (3)
  #define PIN_A4 (4)
  #define PIN_A5 (5)
  #define PIN_VBAT (32)
  #define VBAT_ENABLE (14)

static const uint8_t A0 = PIN_A0;
static const uint8_t A1 = PIN_A1;
static const uint8_t A2 = PIN_A2;
static const uint8_t A3 = PIN_A3;
static const uint8_t A4 = PIN_A4;
static const uint8_t A5 = PIN_A5;
#define ADC_RESOLUTION 12

// Other pins
#define PIN_NFC1 (30)
#define PIN_NFC2 (31)

/*

• Serial interfaces
  */
  #define PIN_SERIAL1_RX (-1) // (7)
  #define PIN_SERIAL1_TX (-1) // (6)

#define PIN_SERIAL2_RX (-1)
#define PIN_SERIAL2_TX (-1)

/*

• SPI Interfaces
  */
  #define SPI_INTERFACES_COUNT 1

#define PIN_SPI_MISO (9) //
#define PIN_SPI_MOSI (10) //
#define PIN_SPI_SCK (8) //

static const uint8_t SS = D4; //
static const uint8_t MOSI = PIN_SPI_MOSI;//
static const uint8_t MISO = PIN_SPI_MISO;//
static const uint8_t SCK = PIN_SPI_SCK;//

// supported modules list
#define USE_SX1262

// common pinouts for SX126X modules
#define SX126X_CS D4 //
#define SX126X_DIO1 D1 //
#define SX126X_BUSY D3 //
#define SX126X_RESET D2 //

// ----------------------------------------------------------------

// E22 Tx/Rx control options:

// 1. Let the E22 control Tx and Rx automagically via DIO2.

// * The E22's TXEN and DIO2 pins are connected to each other, but not to the MCU.
// * The E22's RXEN pin is connected to the MCU.
// * E22_TXEN_CONNECTED_TO_DIO2 is defined so the logic in SX126XInterface.cpp handles this configuration correctly.
#define E22_TXEN_CONNECTED_TO_DIO2
#define SX126X_TXEN RADIOLIB_NC
#define SX126X_RXEN D5

// ------------------------------ OR ------------------------------

// 2. Control Tx and Rx manually.

// * The E22's TXEN and RXEN pins are both connected to the MCU.

// #define SX126X_TXEN D6
// #define SX126X_RXEN D7

// ----------------------------------------------------------------

#ifdef EBYTE_E22
// Internally the TTGO module hooks the SX126x-DIO2 in to control the TX/RX switch
// (which is the default for the sx1262interface code)
#define SX126X_DIO2_AS_RF_SWITCH
#define SX126X_DIO3_TCXO_VOLTAGE 1.8
#ifdef EBYTE_E22_900M30S
// 10dB PA gain and 30dB rated output; based on measurements from
// https://github.com/S5NC/EBYTE_ESP32-S3/blob/main/E22-900M30S%20power%20output%20testing.txt
#define REGULATORY_GAIN_LORA 7
#define SX126X_MAX_POWER 22
#endif
#ifdef EBYTE_E22_900M33S
// 25dB PA gain and 33dB rated output; based on TX Power Curve from E22-900M33S_UserManual_EN_v1.0.pdf
#define REGULATORY_GAIN_LORA 25
#define SX126X_MAX_POWER 8
#endif
#endif

/*

• Wire Interfaces
  */
  #define WIRE_INTERFACES_COUNT 1 // 2

#define PIN_WIRE_SDA (4)
#define PIN_WIRE_SCL (5)

static const uint8_t SDA = PIN_WIRE_SDA;
static const uint8_t SCL = PIN_WIRE_SCL;

#define PIN_LSM6DS3TR_C_POWER (15)
#define PIN_LSM6DS3TR_C_INT1 (18)

// PDM Interfaces
// ---------------
#define PIN_PDM_PWR (19)
#define PIN_PDM_CLK (20)
#define PIN_PDM_DIN (21)

// QSPI Pins
#define PIN_QSPI_SCK (24)
#define PIN_QSPI_CS (25)
#define PIN_QSPI_IO0 (26)
#define PIN_QSPI_IO1 (27)
#define PIN_QSPI_IO2 (28)
#define PIN_QSPI_IO3 (29)

// On-board QSPI Flash
#define EXTERNAL_FLASH_DEVICES P25Q16H
#define EXTERNAL_FLASH_USE_QSPI

// Battery

#define BAT_READ
14 // P0_14 = 14 Reads battery voltage from divider on signal board. (PIN_VBAT is reading voltage divider on XIAO and is
// program pin 32 / or P0.31)
#define BATTERY_SENSE_RESOLUTION_BITS 10
#define CHARGE_LED 23 // P0_17 = 17 D23 YELLOW CHARGE LED
#define HICHG 22 // P0_13 = 13 D22 Charge-select pin for Lipo for 100 mA instead of default 50mA charge

// The battery sense is hooked to pin A0 (5)
#define BATTERY_PIN PIN_VBAT // PIN_A0

// ratio of voltage divider = 3.0 (R17=1M, R18=510k)
#define ADC_MULTIPLIER 3 // 3.0 + a bit for being optimistic

#ifdef __cplusplus
}
#endif

/*----------------------------------------------------------------------------

•    Arduino objects - C++ only
  

----------------------------------------------------------------------------/

#endif
Output Errors:sx162x init resuit -2
No SX1262 radio
`

[madeofstown]

@pepefrog1234
Use this config

variant.h

#ifndef _SEEED_XIAO_NRF52840_SENSE_H_
#define _SEEED_XIAO_NRF52840_SENSE_H_

/** Master clock frequency */
#define VARIANT_MCK (64000000ul)

#define USE_LFXO // Board uses 32khz crystal for LF
// #define USE_LFRC    // Board uses RC for LF

/*----------------------------------------------------------------------------
 *        Headers
 *----------------------------------------------------------------------------*/

#include "WVariant.h"

#ifdef __cplusplus
extern "C" {
#endif // __cplusplus

#define PINS_COUNT (33)
#define NUM_DIGITAL_PINS (33)
#define NUM_ANALOG_INPUTS (8) // A6 is used for battery, A7 is analog reference
#define NUM_ANALOG_OUTPUTS (0)

// LEDs

#define LED_RED 11
#define LED_BLUE 12
#define LED_GREEN 13

#define PIN_LED1 LED_GREEN
#define PIN_LED2 LED_BLUE
#define PIN_LED3 LED_RED

#define PIN_LED PIN_LED1
#define LED_PWR (PINS_COUNT)

#define LED_BUILTIN PIN_LED

#define LED_STATE_ON 1 // State when LED is lit

/*
 * Buttons
 */
/*Due to the lack of pins,and have to make sure gps standby work well we have temporarily removed the button.
There are some technical solutions that can solve this problem,
and we are currently exploring and researching them*/

// #define BUTTON_PIN D0 // This is the Program Button
// // #define BUTTON_NEED_PULLUP 1
// #define BUTTON_ACTIVE_LOW true
// #define BUTTON_ACTIVE_PULLUP false

// Digital PINs
#define D0 (0ul)
#define D1 (1ul)
#define D2 (2ul)
#define D3 (3ul)
#define D4 (4ul)
#define D5 (5ul)
#define D6 (6ul)
#define D7 (7ul)
#define D8 (8ul)
#define D9 (9ul)
#define D10 (10ul)



/*
 * Analog pins
 */
#define PIN_A0 (0)
#define PIN_A1 (1)
#define PIN_A2 (32)
#define PIN_A3 (3)
#define PIN_A4 (4)
#define PIN_A5 (5)
#define PIN_VBAT (32)
#define VBAT_ENABLE (14)

static const uint8_t A0 = PIN_A0;
static const uint8_t A1 = PIN_A1;
static const uint8_t A2 = PIN_A2;
static const uint8_t A3 = PIN_A3;
static const uint8_t A4 = PIN_A4;
static const uint8_t A5 = PIN_A5;
#define ADC_RESOLUTION 12

/*
 * Serial interfaces
 */
#define PIN_SERIAL1_RX (7)
#define PIN_SERIAL1_TX (6)

#define PIN_SERIAL2_RX (-1)
#define PIN_SERIAL2_TX (-1)

/*
 * SPI Interfaces
 */
#define SPI_INTERFACES_COUNT 1

#define PIN_SPI_MISO (9)
#define PIN_SPI_MOSI (10)
#define PIN_SPI_SCK (8)

static const uint8_t SS = D4;
static const uint8_t MOSI = PIN_SPI_MOSI;
static const uint8_t MISO = PIN_SPI_MISO;
static const uint8_t SCK = PIN_SPI_SCK;

// supported modules list
#define USE_SX1262

// common pinouts for SX126X modules

#define SX126X_CS D4
#define SX126X_DIO1 D1
#define SX126X_BUSY D3
#define SX126X_RESET D2

#define SX126X_TXEN RADIOLIB_NC

#define SX126X_RXEN D5
#define SX126X_DIO2_AS_RF_SWITCH // DIO2 is used to control the RF switch really necessary!!!
#define SX126X_DIO3_TCXO_VOLTAGE 1.8
#define REGULATORY_GAIN_LORA 7
#define SX126X_MAX_POWER 22

/*
 * Wire Interfaces
 */

#define I2C_NO_RESCAN           // I2C is a bit finicky, don't scan too much
#define WIRE_INTERFACES_COUNT 1 // 2

#define PIN_WIRE_SDA (24) // change to use the correct pins if needed
#define PIN_WIRE_SCL (25) // change to use the correct pins if needed

static const uint8_t SDA = PIN_WIRE_SDA;
static const uint8_t SCL = PIN_WIRE_SCL;

// GPS L76KB
#define GPS_L76K
#ifdef GPS_L76K
#define PIN_GPS_RX D6
#define PIN_GPS_TX D7
#define HAS_GPS 1
#define GPS_BAUDRATE 9600
#define GPS_THREAD_INTERVAL 50
#undef PIN_SERIAL1_RX
#undef PIN_SERIAL1_TX
#define PIN_SERIAL1_RX PIN_GPS_TX
#define PIN_SERIAL1_TX PIN_GPS_RX
#define PIN_GPS_STANDBY D0
#endif

// Battery

#define BAT_READ                                                                                                                 \
    14 // P0_14 = 14  Reads battery voltage from divider on signal board. (PIN_VBAT is reading voltage divider on XIAO and is
       // program pin 32 / or P0.31)
#define BATTERY_SENSE_RESOLUTION_BITS 10
#define CHARGE_LED 23 // P0_17 = 17  D23   YELLOW CHARGE LED
#define HICHG 22      // P0_13 = 13  D22   Charge-select pin for Lipo for 100 mA instead of default 50mA charge

// The battery sense is hooked to pin A0 (5)
#define BATTERY_PIN PIN_VBAT // PIN_A0

// ratio of voltage divider = 3.0 (R17=1M, R18=510k)
#define ADC_MULTIPLIER 3 // 3.0 + a bit for being optimistic

#ifdef __cplusplus
}
#endif

/*----------------------------------------------------------------------------
 *        Arduino objects - C++ only
 *----------------------------------------------------------------------------*/

#endif

variant.cpp

#include "variant.h"
#include "configuration.h"
#include "nrf.h"
#include "wiring_constants.h"
#include "wiring_digital.h"
#include <map>
#include <memory>
#include <stddef.h>
#include <stdint.h>
const uint32_t g_ADigitalPinMap[] = {
    // D0 .. D13
    2,  // D0  is P0.02 (A0)
    3,  // D1  is P0.03 (A1)
    28, // D2  is P0.28 (A2)
    29, // D3  is P0.29 (A3)
    4,  // D4  is P0.04 (A4,SDA)
    5,  // D5  is P0.05 (A5,SCL)
    43, // D6  is P1.11 (TX)
    44, // D7  is P1.12 (RX)
    45, // D8  is P1.13 (SCK)
    46, // D9  is P1.14 (MISO)
    47, // D10 is P1.15 (MOSI)

    // LEDs
    26, // D11 is P0.26 (LED RED)
    6,  // D12 is P0.06 (LED BLUE)
    30, // D13 is P0.30 (LED GREEN)
    14, // D14 is P0.14 (READ_BAT)

    // LSM6DS3TR
    40, // D15 is P1.08 (6D_PWR)
    27, // D16 is P0.27 (6D_I2C_SCL)
    7,  // D17 is P0.07 (6D_I2C_SDA)
    11, // D18 is P0.11 (6D_INT1)

    // MIC
    42, // 17,//42,  // D19 is P1.10 (MIC_PWR)
    32, // 26,//32,  // D20 is P1.00 (PDM_CLK)
    16, // 25,//16,  // D21 is P0.16 (PDM_DATA)

    // BQ25100
    13, // D22 is P0.13 (HICHG)
    17, // D23 is P0.17 (~CHG)

    //
    21, // D24 is P0.21 (QSPI_SCK)
    25, // D25 is P0.25 (QSPI_CSN)
    20, // D26 is P0.20 (QSPI_SIO_0 DI)
    24, // D27 is P0.24 (QSPI_SIO_1 DO)
    22, // D28 is P0.22 (QSPI_SIO_2 WP)
    23, // D29 is P0.23 (QSPI_SIO_3 HOLD)

    // NFC
    9,  // D30 is P0.09 (NFC1)
    10, // D31 is P0.10 (NFC2)

    // VBAT
    31, // D32 is P0.10 (VBAT)
};

/*
  Copyright (c) 2014-2015 Arduino LLC.  All right reserved.
  Copyright (c) 2016 Sandeep Mistry All right reserved.
  Copyright (c) 2018, Adafruit Industries (adafruit.com)

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

void initVariant()
{
    // LED1 & LED2
    pinMode(21, OUTPUT);
    digitalWrite(21, LOW);
    // LED1 & LED2
    pinMode(22, OUTPUT);
    digitalWrite(22, LOW);

    pinMode(PIN_WIRE_SDA, INPUT_PULLUP);
    pinMode(PIN_WIRE_SCL, INPUT_PULLUP);
}

platformio.ini

; Seeed Xiao BLE: https://www.digikey.com/en/products/detail/seeed-technology-co-ltd/102010448/16652893
[env:xiaowow_nrf52840]
extends = nrf52840_base
board = xiao_ble_sense
build_flags = ${nrf52840_base.build_flags} -Ivariants/xiaowow_nrf52840 -Isrc/platform/nrf52/softdevice -Isrc/platform/nrf52/softdevice/nrf52  -DPRIVATE_HW
  -L "${platformio.libdeps_dir}/${this.__env__}/bsec2/src/cortex-m4/fpv4-sp-d16-hard"
board_build.ldscript = src/platform/nrf52/nrf52840_s140_v7.ld
build_src_filter = ${nrf52_base.build_src_filter} +<../variants/xiaowow_nrf52840>
lib_deps = 
  ${nrf52840_base.lib_deps}
debug_tool = jlink
; If not set we will default to uploading over serial (first it forces bootloader entry by talking 1200bps to cdcacm)
;upload_protocol = jlink

[madeofstown]

@pepefrog1234
Can you post a picture of the board? I haven't ordered the Rev A yet.

[pepefrog1234]

Okey.
This is the board I produced.

But the RF performance is not as good as I expected, I'm wondering if it could be due to insufficient power supply, the module can consume up to 650mA; I haven't used a power meter yet to measure the actual power output.

[madeofstown]

I don't recommend using a battery as a power supply as it will underpower the radio. If you must use a battery then it should be external and provide steady 5v through the USB-C port.

[pepefrog1234]

I am using a mobile power supply for power, not connecting the battery directly on top of the board.

[radonslide]

Do the new changes/patches for the Xiao BLE and the Xiao nRF Kit have any effect on the configs shown here for the Xiaowow! ?