Resolved a startup issue with serial setup that could prevent the device from hashing until a reboot. For an unknown reason, the setup process could fail unless we wait for each write to complete, leaving the device in a non-functional state. The fix ensures that all serial writes are completed before proceeding to the next task.

https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/peripherals/uart.html#transmit-data

The easiest way to reproduce this is by disabling all logging.

diff --git a/main/main.c b/main/main.c
index dbc467b..8e7fb4e 100644
--- a/main/main.c
+++ b/main/main.c
@@ -35,6 +35,8 @@ void app_main(void)
 {
     ESP_LOGI(TAG, "Welcome to the bitaxe - hack the planet!");
 
+    esp_log_level_set("*", ESP_LOG_WARN);
+
     // Init I2C
     ESP_ERROR_CHECK(i2c_bitaxe_init());
     ESP_LOGI(TAG, "I2C initialized successfully");