diff --git a/firmware/main.c b/firmware/main.c
index fbbacbc..208ed6e 100644
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -39,7 +39,8 @@ static int g_local_work = 0;
 static int g_hw_work = 0;
 
 uint32_t g_clock_conf_count = 0;
-
+uint16_t temperature0[10] = {0};
+uint16_t temperature1[10] = {0};
 
 static uint32_t g_nonce2_offset = 0;
 static uint32_t g_nonce2_range = 0xffffffff;
@@ -82,10 +83,11 @@ static void encode_pkg(uint8_t *p, int type, uint8_t *buf, unsigned int len)
 	case AVA2_P_ACKDETECT:
 	case AVA2_P_NONCE:
 	case AVA2_P_TEST_RET:
+	case AVA2_P_INFO_RET:
 		memcpy(data, buf, len);
 		break;
 	case AVA2_P_STATUS:
-		tmp = read_temp0() << 16 | read_temp1();
+		tmp = read_temp0(temperature0) << 16 | read_temp1(temperature1);
 		memcpy(data + 0, &tmp, 4);
 
 		tmp = read_fan0() << 16 | read_fan1();
@@ -229,7 +231,7 @@ static int decode_pkg(uint8_t *p, struct mm_work *mw)
 	case AVA2_P_REQUIRE:
 		break;
 	case AVA2_P_SET:
-		if (read_temp0() >= IDLE_TEMP || read_temp1() >= IDLE_TEMP)
+		if (read_temp0(temperature0) >= IDLE_TEMP || read_temp1(temperature1) >= IDLE_TEMP)
 			break;
 
 		memcpy(&tmp, data, 4);
@@ -262,6 +264,13 @@ static int decode_pkg(uint8_t *p, struct mm_work *mw)
 		set_voltage(ASIC_0V);
 		gpio_led(0);
 		break;
+	case AVA2_P_INFO:
+		memcpy(&tmp, data + 28, 4);
+		if (g_module_id != tmp)
+			break;
+
+		send_pkg(AVA2_P_INFO_RET, hardware_info, sizeof(hardware_info));
+		break;
 	default:
 		break;
 	}
@@ -327,7 +336,6 @@ static int get_pkg(struct mm_work *mw)
 
 			start = 0;
 			count = 2;
-
 			if (decode_pkg(g_pkg, mw)) {
 #ifdef CFG_ENABLE_ACK
 				send_pkg(AVA2_P_NAK, NULL, 0);
@@ -385,7 +393,7 @@ int main(int argv, char **argc)
 
 	uart_init();
 	debug32("%d:MM-%s\n", g_module_id, MM_VERSION);
-	debug32("T:%d, %d\n", read_temp0(), read_temp1());
+	debug32("T:%d, %d\n", read_temp0(temperature0), read_temp1(temperature1));
 
 	timer_set(0, IDLE_TIME);
 	g_new_stratum = 0;
@@ -403,7 +411,7 @@ int main(int argv, char **argc)
 
 		wdg_feed((CPU_FREQUENCY / 1000) * 2);
 		if ((!timer_read(0) && g_new_stratum) ||
-		    (read_temp0() >= IDLE_TEMP && read_temp1() >= IDLE_TEMP)) {
+		    (read_temp0(temperature0) >= IDLE_TEMP && read_temp1(temperature1) >= IDLE_TEMP)) {
 			g_new_stratum = 0;
 			g_local_work = 0;
 			g_hw_work = 0;
diff --git a/firmware/miner.c b/firmware/miner.c
index cd2fe44..4a7de1c 100644
--- a/firmware/miner.c
+++ b/firmware/miner.c
@@ -19,6 +19,28 @@
 #include "alink.h"
 #include "twipwm.h"
 
+uint8_t hardware_info[0x1c] = {
+#if defined(AVALON2_A3255_MACHINE)
+	0,0,0x8a,0,  /* minimum voltage: 1V */
+	0,0,0x8a,0,  /* default voltage: 1V */
+	0,0,0x8a,0,  /* maximum voltage: 1V */
+	0,0,5,0xdc,  /* minimum clock: 1500 MHz */
+	0,0,5,0xdc,  /* default clock: 1500 MHz */
+	0,0,5,0xdc,  /* maximum clock: 1500 MHz */
+#elif defined(AVALON3_A3233_MACHINE) || defined(AVALON3_A3233_CARD)
+	0,0,0xe1,0,  /* minimum voltage: 0.6625V */
+	0,0,0xe1,0,  /* default voltage: 0.6625V */
+	0,0,0xe1,0,  /* maximum voltage: 0.6625V */
+	0,0,1,0xc2,  /* minimum clock: 450 MHz */
+	0,0,1,0xc2,  /* default clock: 450 MHz */
+	0,0,1,0xc2,  /* maximum clock: 450 MHz */
+#else
+#	error "Please define hardware_info for this platform"
+#endif
+	20,  /* max merkle links */
+	(AVA2_P_COINBASE_SIZE >> 0x10) & 0xff, (AVA2_P_COINBASE_SIZE >> 8) & 0xff, AVA2_P_COINBASE_SIZE & 0xff,
+};
+
 static uint32_t g_asic_freq = ASIC_FREQUENCY;
 
 static inline void flip32(void *dest_p, const void *src_p)
@@ -248,7 +270,7 @@ void miner_gen_nonce2_work(struct mm_work *mw, uint32_t nonce2, struct work *wor
 	tmp32 = bswap_32(nonce2);
 	work->nonce2 = nonce2;
 
-	if(mw->coinbase_len > AVA2_P_COINBASE_SIZE) {
+	if (mw->coinbase_len > AVA2_P_COINBASE_SIZE) {
 		nonce2_offset_posthash = (mw->nonce2_offset % SHA256_BLOCK_SIZE) + 32;
 		coinbase_len_posthash = mw->coinbase_len - mw->nonce2_offset + (mw->nonce2_offset % SHA256_BLOCK_SIZE);
 		memcpy(mw->coinbase + nonce2_offset_posthash, (uint8_t *)(&tmp32), mw->nonce2_size);
diff --git a/firmware/miner.h b/firmware/miner.h
index 758d285..561f51b 100644
--- a/firmware/miner.h
+++ b/firmware/miner.h
@@ -71,4 +71,6 @@ int test_nonce(struct mm_work *mw, struct result *ret);
 void set_asic_freq(uint32_t value);
 uint32_t get_asic_freq();
 
+extern uint8_t hardware_info[0x1c];
+
 #endif /* __MINER_H__ */
diff --git a/firmware/protocol.h b/firmware/protocol.h
index d039fe2..7d089e2 100644
--- a/firmware/protocol.h
+++ b/firmware/protocol.h
@@ -38,5 +38,7 @@
 #define AVA2_P_STATUS		24
 #define AVA2_P_ACKDETECT	25
 #define AVA2_P_TEST_RET		26
+#define AVA2_P_INFO		28
+#define AVA2_P_INFO_RET		29
 
 #endif	/* _PROTOCOL_H_ */
diff --git a/firmware/twipwm.c b/firmware/twipwm.c
index 5cb41cd..8978c5b 100644
--- a/firmware/twipwm.c
+++ b/firmware/twipwm.c
@@ -12,7 +12,6 @@
 #include "defines.h"
 #include "io.h"
 
-
 static struct lm32_twipwm *tp = (struct lm32_twipwm *)TWIPWM_BASE;
 
 static void twi_start(void)
@@ -120,12 +119,46 @@ void adjust_fan(uint32_t pwm)
 	write_pwm(value);
 }
 
-uint16_t read_temp0()
+uint16_t read_temp0(uint16_t *temperature)
 {
-	return (twi_read_2byte(LM32_TWI_REG_TEMP0) >> 4) / 16;
+	int i;
+	uint32_t sum = 0;
+	uint16_t min = temperature[0];
+	uint16_t max = temperature[0];
+	uint16_t temp[10] = {0};
+
+	memcpy(temp, temperature + 1, 9 * sizeof(uint16_t));
+	temp[9] = (twi_read_2byte(LM32_TWI_REG_TEMP0) >> 4) / 16;
+	memcpy(temperature, temp, 10 * sizeof(uint16_t));
+	for(i = 0; i < 10; i++)
+	{
+		if(max < temperature[i])
+			max = temperature[i];
+		if(min > temp[i])
+			min = temperature[i];
+		sum = sum + temperature[i];
+	}
+	return (uint16_t)((sum - max - min) / 8);
 }
 
-uint16_t read_temp1()
+uint16_t read_temp1(uint16_t *temperature)
 {
-	return (twi_read_2byte(LM32_TWI_REG_TEMP1) >> 4) / 16;
+	int i;
+	uint32_t sum = 0;
+	uint16_t min = temperature[0];
+	uint16_t max = temperature[0];
+	uint16_t temp[10] = {0};
+
+	memcpy(temp, temperature + 1, 9 * sizeof(uint16_t));
+	temp[9] = (twi_read_2byte(LM32_TWI_REG_TEMP0) >> 4) / 16;
+	memcpy(temperature, temp, 10 * sizeof(uint16_t));
+	for(i = 0; i < 10; i++)
+	{
+		if(max < temperature[i])
+			max = temperature[i];
+		if(min > temp[i])
+			min = temperature[i];
+		sum = sum + temperature[i];
+	}
+	return (uint16_t)((sum - max - min) / 8);
 }
diff --git a/firmware/twipwm.h b/firmware/twipwm.h
index 3eb27c9..f58fd95 100644
--- a/firmware/twipwm.h
+++ b/firmware/twipwm.h
@@ -20,8 +20,8 @@ void wdg_feed(uint32_t value);
 uint32_t read_fan0();
 uint32_t read_fan1();
 
-uint16_t read_temp0();
-uint16_t read_temp1();
+uint16_t read_temp0(uint16_t *temperature);
+uint16_t read_temp1(uint16_t *temperature);
 
 void adjust_fan(uint32_t pwm);
 void reset();