# Murata ABZ internal connections

**URL:** <https://www.thethingsnetwork.org/forum/t/murata-abz-internal-connections/27090>\
**Category:** Hardware\
**Created:** [June 13, 2019, 10:32am UTC](https://www.thethingsnetwork.org/forum/t/murata-abz-internal-connections/27090 "2019-06-13T10:32:37Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![atoy40](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/atoy40/32/24925_2.png) [@atoy40](https://www.thethingsnetwork.org/forum/u/atoy40)\
**Post date:** [June 13, 2019, 10:32am UTC](https://www.thethingsnetwork.org/forum/t/murata-abz-internal-connections/27090/1 "2019-06-13T10:32:37Z")

</div>

Hello,

Can we find anywhere a document listing all pins used to connect the MCU to the SX1276 into the Murata ABZ module ?

Thanks  
Anthony.

---

<div class="post-metadata">

**Author:** ![AdamJP](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/adamjp/32/35886_2.png) [@AdamJP](https://www.thethingsnetwork.org/forum/u/AdamJP)\
**Post date:** [June 13, 2019, 10:39am UTC](https://www.thethingsnetwork.org/forum/t/murata-abz-internal-connections/27090/2 "2019-06-13T10:39:38Z")

</div>

You should contact @onehorse he has ported it to arduino, so I’d guess he’d know the internals.

> **[kriswiner/CMWX1ZZABZ](https://github.com/kriswiner/CMWX1ZZABZ)**
>
> Collection of sketches using the Arduino core for Murata's CMWX1ZZABZ (STM32L082 and SX1276) - kriswiner/CMWX1ZZABZ

---

<div class="post-metadata">

**Author:** ![ribbotson](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/ribbotson/32/20484_2.png) [@ribbotson](https://www.thethingsnetwork.org/forum/u/ribbotson)\
**Post date:** [June 13, 2019, 2:18pm UTC](https://www.thethingsnetwork.org/forum/t/murata-abz-internal-connections/27090/3 "2019-06-13T14:18:13Z")

</div>

If you download the example files from the STM site you will find this info in the source code.  
/\* LORA I/O definition \*/

```
    #define RADIO_RESET_PORT GPIOC
    #define RADIO_RESET_PIN GPIO_PIN_0

    #define RADIO_MOSI_PORT GPIOA
    #define RADIO_MOSI_PIN GPIO_PIN_7

    #define RADIO_MISO_PORT GPIOA
    #define RADIO_MISO_PIN GPIO_PIN_6

    #define RADIO_SCLK_PORT GPIOB
    #define RADIO_SCLK_PIN GPIO_PIN_3

    #define RADIO_NSS_PORT GPIOA
    #define RADIO_NSS_PIN GPIO_PIN_15

    #define RADIO_DIO_0_PORT GPIOB
    #define RADIO_DIO_0_PIN GPIO_PIN_4

    #define RADIO_DIO_1_PORT GPIOB
    #define RADIO_DIO_1_PIN GPIO_PIN_1

    #define RADIO_DIO_2_PORT GPIOB
    #define RADIO_DIO_2_PIN GPIO_PIN_0

    #define RADIO_DIO_3_PORT GPIOC
    #define RADIO_DIO_3_PIN GPIO_PIN_13

    #ifdef RADIO_DIO_4 
    #define RADIO_DIO_4_PORT GPIOA
    #define RADIO_DIO_4_PIN GPIO_PIN_5
    #endif

    #ifdef RADIO_DIO_5 
    #define RADIO_DIO_5_PORT GPIOA
    #define RADIO_DIO_5_PIN GPIO_PIN_4
    #endif

    #define RADIO_TCXO_VCC_PORT GPIOA
    #define RADIO_TCXO_VCC_PIN GPIO_PIN_12

    #define RADIO_ANT_SWITCH_PORT_RX GPIOA //CRF1
    #define RADIO_ANT_SWITCH_PIN_RX GPIO_PIN_1

    #define RADIO_ANT_SWITCH_PORT_TX_BOOST GPIOC //CRF3
    #define RADIO_ANT_SWITCH_PIN_TX_BOOST GPIO_PIN_1

    #define RADIO_ANT_SWITCH_PORT_TX_RFO GPIOC //CRF2
    #define RADIO_ANT_SWITCH_PIN_TX_RFO GPIO_PIN_2
```

---

<div class="post-metadata">

**Author:** ![atoy40](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/atoy40/32/24925_2.png) [@atoy40](https://www.thethingsnetwork.org/forum/u/atoy40)\
**Post date:** [June 14, 2019, 8:34am UTC](https://www.thethingsnetwork.org/forum/t/murata-abz-internal-connections/27090/4 "2019-06-14T08:34:58Z")

</div>

Thanks @ribbotson 🙂  
but it’s strange it’s not included in any Murata datasheet and to have to search in codes to get it !

---

<div class="post-metadata">

**Author:** ![system](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/6/2/6250ea44fd2b0d6259489e1a92748df681e1f970.png) [@system](https://www.thethingsnetwork.org/forum/u/system)\
**Post date:** [August 13, 2019, 8:35am UTC](https://www.thethingsnetwork.org/forum/t/murata-abz-internal-connections/27090/5 "2019-08-13T08:35:00Z")

</div>

This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.