diff --git a/lib/uart.c b/lib/uart.c
index 18c58c0..1be56a4 100644
--- a/lib/uart.c
+++ b/lib/uart.c
@@ -43,7 +43,7 @@
 #define UART_BAUDRATE 921600 /**< serial baud rate, in bits per second (with 8N1 8 bits, no parity bit, 1 stop bit settings) */
 
 /* output ring buffer, indexes, and available memory */
-static volatile uint8_t tx_buffer[64] = {0}; /**< ring buffer for data to transmit */
+static volatile uint8_t tx_buffer[256] = {0}; /**< ring buffer for data to transmit */
 static volatile uint16_t tx_i = 0; /**< current position of transmitted data */
 static volatile uint16_t tx_used = 0; /**< how much data needs to be transmitted */