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Top Forums Programming Arduino Project: iPhone to HM-10 BLE to NB-IoT Shield to NB-IoT Network to Internet to Linux Server Post 303043415 by Neo on Tuesday 28th of January 2020 10:48:23 AM
Old 01-28-2020

AltSoftSerial uses these pins on the Arduino UNO, according to AltSoftSerial_Boards.h (included with the AIS NB-IoT libs):

// Arduino Uno, Duemilanove, LilyPad, etc
#elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)

 #define INPUT_CAPTURE_PIN               8 // receive
 #define OUTPUT_COMPARE_A_PIN            9 // transmit
 #define OUTPUT_COMPARE_B_PIN           10 // unusable PWM

My BLE module sketch (taken from an ArduinoBlue example sketch) uses pins:

// The bluetooth tx and rx pins must be supported by software serial.
// Visit for unsupported pins.
// Bluetooth TX -> Arduino D8
const int BLUETOOTH_TX = 8;
// Bluetooth RX -> Arduino D7
const int BLUETOOTH_RX = 7;

So, not yet more more than an Arduino noob, my first guess is that I should move the Arduino UNO pins for the HM-10 BLE module to some supported SoftwareSerial pins which are different than the AltSoftSerial pins (8,9) above.

Seems the conflict is pin 8 being used by both SoftwareSerial (used in the BLE code) and AltSoftSerial (used in the NB-IoT code).

Will try different pins tomorrow and see how far that get me.
This User Gave Thanks to Neo For This Post:
Test Your Knowledge in Computers #661
Difficulty: Easy
DOS uses the File Access Table (FAT) filesystem.
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GPIO(3) 						   BSD Library Functions Manual 						   GPIO(3)

gpio_open, gpio_close -- library to handle GPIO pins LIBRARY
library ``libgpio'' SYNOPSIS
#include <libgpio.h> gpio_handle_t gpio_open(unsigned int unit); gpio_handle_t gpio_open_device(const char *device); void gpio_close(gpio_handle_t handle); int gpio_pin_list(gpio_handle_t handle, gpio_config_t **pcfgs); int gpio_pin_config(gpio_handle_t handle, gpio_config *cfg); int gpio_pin_set_flags(gpio_handle_t handle, gpio_config_t *cfg); gpio_value_t gpio_pin_get(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_set(gpio_handle_t handle, gpio_pin_t pin, gpio_value_t value); int gpio_pin_toggle(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_low(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_high(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_input(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_output(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_opendrain(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_pushpull(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_tristate(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_pullup(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_pulldown(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_invin(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_invout(gpio_handle_t handle, gpio_pin_t pin); int gpio_pin_pulsate(gpio_handle_t handle, gpio_pin_t pin); DESCRIPTION
The libgpio library provides an interface to configure GPIO pins. The library operates with a gpio_handle_t opaque type which can be created with gpio_open() or gpio_open_device(). When no more GPIO operations are needed, this handle can be destroyed with gpio_close(). To get a list of all available pins, one can call gpio_pin_list(). This function takes a pointer to a gpio_config_t which is dynamically allocated. This pointer should be freed with free(3) when it's no longer necessary. The function gpio_pin_config() retrieves the current configuration of a pin. The pin number should be passed in via the g_pin variable which is part of the gpio_config_t structure. The function gpio_pin_set_flags() configures a pin with the flags passed in by the gpio_config_t structure. The pin number should also be passed in through the g_pin variable. All other structure members will be ignored by this function. The list of flags can be found in /usr/include/sys/gpio.h. The get or set the state of a GPIO pin, the functions gpio_pin_get() and gpio_pin_set() are available, respectively. To toggle the state, use gpio_pin_toggle(). The functions gpio_pin_low() and gpio_pin_high() are wrappers around gpio_pin_set(). The functions gpio_pin_input(), gpio_pin_output(), gpio_pin_opendrain(), gpio_pin_pushpull(), gpio_pin_tristate(), gpio_pin_pullup(), gpio_pin_pulldown(), gpio_pin_invin(), gpio_pin_invout() and gpio_pin_pulsate() are wrappers around gpio_pin_set_flags(). EXAMPLES
The following example shows how to configure pin 16 as output and then drive it high: #include <err.h> #include <libgpio.h> gpio_handle_t handle; handle = gpio_open(0); if (handle == GPIO_HANDLE_INVALID) err(1, "gpio_open failed"); gpio_pin_output(handle, 16); gpio_pin_high(handle, 16); gpio_close(handle); The following example shows how to get a configuration of a pin: gpio_config_t cfg; cfg.g_pin = 32; gpio_pin_config(handle, &cfg); The structure will contain the name of the pin and its flags. SEE ALSO
gpiobus(4), gpioctl(8) HISTORY
The libgpio library first appeared in FreeBSD 11.0. AUTHORS
The libgpio library was implemented by Rui Paulo <>. BSD
November 17, 2014 BSD

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