diff --git a/ccid_host/cuart_fsm_test.c b/ccid_host/cuart_fsm_test.c
new file mode 100644
index 0000000..92f3437
--- /dev/null
+++ b/ccid_host/cuart_fsm_test.c
@@ -0,0 +1,112 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <signal.h>
+#include <osmocom/core/utils.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/application.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/sim/sim.h>
+
+#include "logging.h"
+#include "cuart.h"
+#include "iso7816_fsm.h"
+
+static struct card_uart g_cuart;
+
+enum test_state {
+	ST_WAIT_ATR,
+	ST_ATR_DONE,
+	ST_IN_TPDU,
+};
+static enum test_state g_tstate = ST_WAIT_ATR;
+
+static void fsm_user_cb(struct osmo_fsm_inst *fi, int event, int cause, void *data)
+{
+	printf("Handle FSM User Event %d: cause=%d, data=%p\n", event, cause, data);
+	switch (event) {
+	case ISO7816_E_ATR_DONE_IND:
+		g_tstate = ST_ATR_DONE;
+		break;
+	case ISO7816_E_TPDU_DONE_IND:
+		printf("======= TPDU: %s\n", msgb_hexdump(data));
+		msgb_free(data);
+		g_tstate = ST_ATR_DONE;
+	default:
+		break;
+	}
+}
+
+static void *tall_main_ctx;
+
+static void signal_handler(int signal)
+{
+	switch (signal) {
+	case SIGUSR1:
+		talloc_report_full(tall_main_ctx, stderr);
+		break;
+	}
+}
+
+int main(int argc, char **argv)
+{
+	struct osmo_fsm_inst *fi;
+	uint8_t atr[64];
+	int rc;
+
+	tall_main_ctx = talloc_named_const(NULL, 0, "main");
+	msgb_talloc_ctx_init(tall_main_ctx, 0);
+	osmo_init_logging2(tall_main_ctx, &log_info);
+	osmo_fsm_log_addr(false);
+
+	signal(SIGUSR1, &signal_handler);
+
+	rc = card_uart_open(&g_cuart, "tty", "/dev/ttyUSB5");
+	if (rc < 0) {
+		perror("opening UART");
+		exit(1);
+	}
+
+	fi = iso7816_fsm_alloc(NULL, LOGL_DEBUG, "SIM0", &g_cuart, fsm_user_cb, NULL);
+	OSMO_ASSERT(fi);
+
+	/* activate reset, then power up */
+	card_uart_ctrl(&g_cuart, CUART_CTL_RST, true);
+	card_uart_ctrl(&g_cuart, CUART_CTL_POWER, true);
+	osmo_fsm_inst_dispatch(fi, ISO7816_E_POWER_UP_IND, NULL);
+
+	/* activate clock */
+	card_uart_ctrl(&g_cuart, CUART_CTL_CLOCK, true);
+
+	/* wait some time and release reset */
+	usleep(10000);
+	card_uart_ctrl(&g_cuart, CUART_CTL_RST, false);
+	osmo_fsm_inst_dispatch(fi, ISO7816_E_RESET_REL_IND, NULL);
+
+	/* process any events in polling mode for initial change */
+	osmo_select_main(1);
+
+	struct msgb *apdu;
+	while (1) {
+		/* check if the new state requires us to do something */
+		switch (g_tstate) {
+		case ST_ATR_DONE:
+			apdu = msgb_alloc(512, "TPDU");
+			msgb_put_u8(apdu, 0x00);
+			msgb_put_u8(apdu, 0xa4);
+			msgb_put_u8(apdu, 0x00);
+			msgb_put_u8(apdu, 0x04);
+			msgb_put_u8(apdu, 0x02);
+			msgb_put_u8(apdu, 0x2f);
+			msgb_put_u8(apdu, 0x00);
+			osmo_fsm_inst_dispatch(fi, ISO7816_E_XCEIVE_TPDU_CMD, apdu);
+			g_tstate = ST_IN_TPDU;
+			break;
+		default:
+			break;
+		}
+		osmo_select_main(0);
+	}
+
+	exit(0);
+}