From 10d6898e43d393018ed78169f50ac6368ce3b1d4 Mon Sep 17 00:00:00 2001
From: simon <simon.kruecken@web.de>
Date: Sat, 28 Dec 2024 18:20:56 +0100
Subject: [PATCH] Added Basic Uart Setup

---
 main/main.c | 39 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/main/main.c b/main/main.c
index ab6145e..69858bc 100644
--- a/main/main.c
+++ b/main/main.c
@@ -1,11 +1,14 @@
 #include "assert.h"
 #include "driver/gpio.h"
+#include "driver/uart.h"
 #include "esp_log.h"
 #include "esp_phy_init.h"
 #include "esp_rom_gpio.h"
 #include "esp_timer.h"
 #include "esp_wifi.h"
+#include "hal/uart_types.h"
 #include "nvs_flash.h"
+#include "portmacro.h"
 #include <esp_event.h>
 #include <esp_now.h>
 #include <esp_wifi.h>
@@ -20,6 +23,11 @@
 
 #define MASTER_MODE_PIN GPIO_NUM_23 // Jumper-Erkennungspin
 #define BROADCAST_INTERVAL_MS 500
+
+#define BUF_SIZE (1024)
+#define TXD_PIN (GPIO_NUM_17)
+#define RXD_PIN (GPIO_NUM_16)
+
 uint8_t broadcast_address[ESP_NOW_ETH_ALEN] = {0xFF, 0xFF, 0xFF,
                                                0xFF, 0xFF, 0xFF};
 #define IS_BROADCAST_ADDR(addr)                                                \
@@ -126,7 +134,6 @@ void master_broadcast_task(void *param) {
 
 void master_ping_task(void *param) {
   while (1) {
-    ESP_LOGI(TAG, "SENDING PING TO CLIENTS");
     for (size_t i = 0; i < numClients; ++i) {
       if (clients[i].isAvailable) {
         PingPayload payload = {};
@@ -241,6 +248,35 @@ void client_data_sending_task(void *param) {
   }
 }
 
+void uart_read_task(void *param) {
+  uint8_t *data = (uint8_t *)malloc(BUF_SIZE);
+  int len = 0;
+  while (1) {
+    len = 0;
+    len =
+        uart_read_bytes(UART_NUM_2, data, BUF_SIZE, (20 / portTICK_PERIOD_MS));
+    if (len > 0) {
+      data[len] = '\0';
+      ESP_LOGI(TAG, "GOT UART DATA %s", data);
+      uart_write_bytes(UART_NUM_2, data, len);
+    }
+  }
+}
+
+void init_uart() {
+  uart_config_t uart_config = {.baud_rate = 115200,
+                               .data_bits = UART_DATA_8_BITS,
+                               .parity = UART_PARITY_DISABLE,
+                               .stop_bits = UART_STOP_BITS_1,
+                               .flow_ctrl = UART_HW_FLOWCTRL_DISABLE};
+
+  uart_driver_install(UART_NUM_2, BUF_SIZE * 2, 0, 0, NULL, 0);
+  uart_param_config(UART_NUM_2, &uart_config);
+  uart_set_pin(UART_NUM_2, TXD_PIN, RXD_PIN, UART_PIN_NO_CHANGE,
+               UART_PIN_NO_CHANGE);
+  xTaskCreate(uart_read_task, "Read Uart", 4096, NULL, 1, NULL);
+}
+
 void app_main(void) {
   esp_err_t ret = nvs_flash_init();
   if (ret == ESP_ERR_NVS_NO_FREE_PAGES ||
@@ -287,6 +323,7 @@ void app_main(void) {
     add_peer(broadcast_address);
     xTaskCreate(master_broadcast_task, "MasterBroadcast", 4096, NULL, 1, NULL);
     xTaskCreate(master_ping_task, "MasterPing", 4096, NULL, 1, NULL);
+    init_uart();
   } else {
     ESP_LOGI(TAG, "Started in Slavemode");
     xTaskCreate(client_data_sending_task, "ClientDataSending", 4096, NULL, 1,