Control servo remotely without encryption.

2 files changed, 19 insertions, 51 deletions

diff --git a/lock/bend.c b/lock/bend.c
index 896c0b3..8436770 100644
--- a/lock/bend.c
+++ b/lock/bend.c
@@ -130,36 +130,16 @@ int main(void)
 	uart_write_line("reset...");
 
 	for (;;) {
-		if (!rxd)
-			_delay_ms(500);
-
 		if (rxd) {
 			n = radio_recv(buf, WDLEN);
 			buf[n] = '\0';	
+			rxd = 0;
 			uart_write("recv: ");
 			uart_write(buf);
-			itoa(n, s, 10);
-			uart_write(s);
-			uart_write_line(" bytes");
-			if (!sync) {
-				xor(KEY, buf, msg, WDLEN);
-				if (strncmp(msg, SYN, WDLEN) == 0) {
-					keygen(key, WDLEN + 1);
-					xor(KEY, key, buf, WDLEN);
-					sync = radio_sendto(txaddr, buf, WDLEN);
-				} else {
-					uart_write_line("not syn");
-				}
-			} else {
-				sync = 0;
-				xor(key, buf, msg, WDLEN);
-				if (strncmp(msg, LOCK, WDLEN) == 0)
-					lock();
-				else if (strncmp(msg, UNLOCK, WDLEN) == 0)
-					unlock();
-				keydel(buf, WDLEN);
-			}
-			rxd = 0;
+			if (strncmp(buf, LOCK, WDLEN) == 0)
+				lock();
+			else if (strncmp(buf, UNLOCK, WDLEN) == 0)
+				unlock();
 		}
 	}
 	return 0;
diff --git a/lock/fend.c b/lock/fend.c
index 4b63759..927c310 100644
--- a/lock/fend.c
+++ b/lock/fend.c
@@ -61,36 +61,24 @@ int main(void)
 	sei();
 
 	for (;;) {
-		if ((islock || isunlock) && !sync) {
-			xor(KEY, SYN, buf, WDLEN);
+		if (islock) {
 			do {
-				sync = radio_sendto(txaddr, buf, WDLEN);
-				_delay_ms(10);
+				sync = radio_sendto(txaddr, LOCK, WDLEN);
+				_delay_ms(50);
 			} while (!sync);
-			sync = 1;
-			uart_write_line("sent syn");
+			sync = 0;
+			islock = 0;
+			uart_write_line("sent LOCK");
 		}
 
-		if (rxd) {
-			if (sync) {
-				n = radio_recv(buf, WDLEN);
-				buf[n] = '\0';
-				xor(KEY, buf, key, WDLEN);
-				uart_write_line("read key");
-				if (islock) {
-					islock = 0;
-					xor(key, LOCK, buf, WDLEN);
-				} else if (isunlock) {
-					isunlock = 0;
-					xor(key, UNLOCK, buf, WDLEN);
-				}
-				radio_sendto(txaddr, buf, WDLEN);
-				sync = 0;
-				uart_write_line("sent command");
-			} else {
-				radio_flush_rx();
-			}
-			rxd = 0;
+		if (isunlock) {
+			do {
+				sync = radio_sendto(txaddr, UNLOCK, WDLEN);
+				_delay_ms(50);
+			} while (!sync);
+			sync = 0;
+			isunlock = 0;
+			uart_write_line("sent UNLOCK");
 		}
 	}
 	return 0;