ESP32 working as an I2C slave device, receiving writes from PSOC master
Posted: Thu Apr 26, 2018 5:42 pm
Hello guys.
I'm trying to get my esp32 working as a slave device and BLE server so that it can receive information from another microcontroller (psoc 5) and send it through bluetooth/wifi. I've been googling and checking examples on github for the past few days and although I got a good grasp at how i2c works, most of the examples are about esp32 working as master and writing/reading to/from slaves. I got my slave initialization done as follows:
What I need is to know how to process the information once I received it in the loop function. I'm assuming that my master already sent me the data string, I need to know is how to access it and how to reply with the ACK so I can then print it in the serial monitor to check if it is working.
I'm using the ESP32 Thing from Sparkfun and programming it through the Arduino IDE. I based my code on this example: https://github.com/espressif/esp-idf/bl ... ple_main.c
Is there any basic example on how to process this information?
Thank you.
I'm trying to get my esp32 working as a slave device and BLE server so that it can receive information from another microcontroller (psoc 5) and send it through bluetooth/wifi. I've been googling and checking examples on github for the past few days and although I got a good grasp at how i2c works, most of the examples are about esp32 working as master and writing/reading to/from slaves. I got my slave initialization done as follows:
Code: Select all
/*
*
* SLAVE INIT
*
*/
int i2c_slave_port = I2C_SLAVE_NUM;
i2c_config_t conf_slave;
conf_slave.sda_io_num = (gpio_num_t)I2C_SLAVE_SDA_IO;
conf_slave.sda_pullup_en = GPIO_PULLUP_ENABLE;
conf_slave.scl_io_num = (gpio_num_t)I2C_SLAVE_SCL_IO;
conf_slave.scl_pullup_en = GPIO_PULLUP_ENABLE;
conf_slave.mode = I2C_MODE_SLAVE;
conf_slave.slave.addr_10bit_en = 0;
conf_slave.slave.slave_addr = ESP_SLAVE_ADDR;
i2c_param_config((i2c_port_t)i2c_slave_port, &conf_slave);
i2c_driver_install((i2c_port_t)i2c_slave_port, conf_slave.mode, I2C_SLAVE_RX_BUF_LEN, I2C_SLAVE_TX_BUF_LEN, 0);
/**/What I need is to know how to process the information once I received it in the loop function. I'm assuming that my master already sent me the data string, I need to know is how to access it and how to reply with the ACK so I can then print it in the serial monitor to check if it is working.
I'm using the ESP32 Thing from Sparkfun and programming it through the Arduino IDE. I based my code on this example: https://github.com/espressif/esp-idf/bl ... ple_main.c
Is there any basic example on how to process this information?
Thank you.