8 years, 8 months ago.  This question has been closed. Reason: Duplicate question

Bug reporting The socket is not readable.

I have been trying an Adafruit cc3000 shield on those platforms: Arch Max / LPCExpresso4337 / Nucleo F411RE. Each platform obviously has access to the cc3000 chip. It can read the MAC address and Firmware version, connects to the WiFi, and it even gets an IP address via DHCP from the router, which I can ping from the laptop.

The program I use to test is the cc3000_ntp_demo, slightly modified to get GPIO correct for the shield. It uses the libraries: cc3000_hostdriver_mbedsocket, NTPClient, and NVIC_set_all_priorities.

Once it comes to accessing the internet, for example getting the time from an NTP-server, it hangs there, when calling ntp_client.setTime(domain_name, port_number). The problem seems to receive data with the socket. It comes in a loop, because the socket is not readable (DEBUG enabled): .

[CC3000 : HCI TX] Command Sent : 0x1008
[CC3000 : HCI RX] Event Received : 0x1008 - BSD Select
[CC3000 : SOCKET] Select on sock_fd: 0, returns 0. fdSet: 0
[CC3000 : SOCKET] The socket is not readable. _sock_fd: 0

. The voltages measured on the cc3000 shield power pins look fine: 5.03V and 3.32V.

The output looks like: .

mbed cc3000 NTP client demo. 
Initialize the interface with DHCP...
Read from cc3000...
Firmware version: 1.32
MAC address     : 08:00:28:57:A0:5A
WiFi parameters:
SSID            : Prakjaroen
Phrase          : A4B5C6D7E8F9
Security        : WPA2
Bring the interface up...
IP              : 192.168.2.123
Netmask         : 255.255.255.0
Gateway         : 192.168.2.1
MAC             : 0.0.0.0
Connected       : 1
DHCP            : 1
Enabled         : 1
Reading time...
[CC3000 : HCI TX] Command Sent : 0x1001
[CC3000 : HCI RX] Event Received : 0x1001 - Socket
[CC3000 : SOCKET] Socket created (fd: 0 type: 2, protocol: 17)
[CC3000 : HCI TX] Command Sent : 0x1002
[CC3000 : HCI RX] Event Received : 0x1002 - Bind
[CC3000 : HCI TX] Command Sent : 0x1010
[CC3000 : HCI RX] Event Received : 0x1010 - Get Hostname
[CC3000 : SOCKET] remote host address (string): 134.0.16.1
[CC3000 : SOCKET] remote host address from s_addr : 134.0.16.1
[CC3000 : SOCKET] port: 123
[CC3000 : HCI RX] Event Received : 0x100F - Send To
[CC3000 : HCI TX] Command Sent : 0x1008
[CC3000 : HCI RX] Event Received : 0x1008 - BSD Select
[CC3000 : SOCKET] Select on sock_fd: 0, returns 0. fdSet: 0
[CC3000 : SOCKET] The socket is not readable. _sock_fd: 0
[CC3000 : HCI TX] Command Sent : 0x1008
[CC3000 : HCI RX] Event Received : 0x1008 - BSD Select
[CC3000 : SOCKET] Select on sock_fd: 0, returns 0. fdSet: 0
[CC3000 : SOCKET] The socket is not readable. _sock_fd: 0

.

Note: "The socket is not readable. _sock_fd: 0" .

Main.cpp: .

/* mbed Microcontroller Library
 * Copyright (c) 2006-2013 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "mbed.h"
#include "cc3000.h"
#include "main.h"
#include "NTPClient.h"

#define CC3000_IRQ   D3  // (D3)
#define CC3000_EN    D5  // (D5)
#define CC3000_CS    D10 // (D10)
#define CC3000_MOSI  D11 // (D11)
#define CC3000_MISO  D12 // (D12)
#define CC3000_SCLK  D13 // (D13)

#define SSID         "Prakjaroen"
#define PHRASE       "A4B5C6D7E8F9"
#define SECURITY     WPA2

#define IP           "192.168.2.165"
#define MASK         "255.255.255.0"
#define GW           "192.168.2.1"
#define DHCP         0
#define STATIC_IP    1
#define IP_INIT      DHCP

using namespace mbed_cc3000;

// cc3000 wifi(irq, en, cs, SPI(mosi, miso, sclk), SSID, PHRASE, WPA2, false);
// +5V  VCC     5V               +5V
// GND  GND     GND              GND
// D8   INT     Interrupt        PA_9
// D9   EN      WiFi Enable      PC_7
// D10  CS      SPI Chip Select  PB_6
// D11  MOSI    SPI MOSI         PA_7
// D12  MISO    SPI MISO         PA_6
// D13  SCK     SPI Clock        PA_5

/* cc3000 module declaration specific for user's board. Check also init() */
#if (MY_BOARD == WIGO)
cc3000 wifi(PTA16, PTA13, PTD0, SPI(PTD2, PTD3, PTC5), SSID, PHRASE, SECURITY, false);
Serial pc(USBTX, USBRX);
#elif (MY_BOARD == WIFI_DIPCORTEX)
cc3000 wifi(p28, p27, p30, SPI(p21, p14, p37), SSID, PHRASE, SECURITY, false);
Serial pc(UART_TX, UART_RX);
#elif (MY_BOARD == MBED_BOARD_EXAMPLE)
cc3000 wifi(CC3000_IRQ, CC3000_EN, CC3000_CS, SPI(CC3000_MOSI, CC3000_MISO, CC3000_SCLK), SSID, PHRASE, SECURITY, false); //SparkFun Board on Arduino pin definitions
//Serial pc(USBTX, USBRX);
Serial pc(P2_10, P2_11); // TX, RX
#else

#endif

// array to store RM parameters from EEPROM
unsigned char cRMParamsFromEeprom[128];

// array to store MAC address from EEPROM
unsigned char cMacFromEeprom[6];

/**
 *  \brief NTP client demo
 *  \param  none
 *  \return int
 */
int main() {
    uint8_t firmware_ver[2];
    signed char mac_status = -1;
    unsigned char FW_status = 1;

    init(); /* board dependent init */
    pc.baud(230400);
    printf("\r\n\r\nmbed cc3000 NTP client demo. \r\n");

#if (IP_INIT == STATIC_IP)
    printf("Initialize the interface with a static IP address...\r\n");
    wifi.init(IP, MASK, GW);
#else
    printf("Initialize the interface with DHCP...\r\n");
    wifi.init();
#endif /* STM32F10X_CL */

    printf("Read from cc3000...\r\n");
        
    // Read Firmware Version and MAC Address
    FW_status = wifi.read_sp_version(firmware_ver);   // read actual Firmware version
    if(FW_status == 0){
        printf("Firmware version: %d.%d\n\r",firmware_ver[0],firmware_ver[1]);
        mac_status = wifi.get_mac_address(cMacFromEeprom);
        if(mac_status == 0){
            printf("MAC address     : ");
            for(int i = 0; i < 6; i++) {
                printf("%02X", cMacFromEeprom[i]);
                if (i < 5) printf(":");
            }
            printf("\r\n");
        }
    } else {
        printf("ERROR: CC3000 not found - check connections !\r\n");
    }

    // WiFi parameters
    printf("WiFi parameters:\r\n");
    printf("SSID            : %s\r\n", SSID);
    printf("Phrase          : %s\r\n", PHRASE);
    printf("Security        : ");
    if (SECURITY == 0) printf("NONE");
    if (SECURITY == 1) printf("WEP");
    if (SECURITY == 2) printf("WPA");
    if (SECURITY == 3) printf("WPA2");
    printf("\r\n");
    
    wait(1.0);
  
    // Connect to WiFi
    printf("Bring the interface up...\r\n");
    if (wifi.connect(30000) == -1) {
        printf("ERROR: Failed to connect. Please verify connection details and try again.\r\n");
    }
    char *ip     = wifi.getIPAddress();
    char *mask   = wifi.getNetworkMask();
    char *gate   = wifi.getGateway();
    char *mac    = wifi.getMACAddress();
    bool conn    = wifi.is_connected();
    bool dhcp    = wifi.is_dhcp_configured();
    bool enabled = wifi.is_enabled();
    
    printf("IP              : %s\r\n", ip);
    printf("Netmask         : %s\r\n", mask);
    printf("Gateway         : %s\r\n", gate);
    printf("MAC             : %s\r\n", mac);
    printf("Connected       : %d\r\n", conn);
    printf("DHCP            : %d\r\n", dhcp);
    printf("Enabled         : %d\r\n", enabled);

    wait(1.0);
    
    // Read time from server
    NTPClient ntp_client;
    // NTP Server Parameters
    char* domain_name = "0.uk.pool.ntp.org";
    int   port_number = 123;

    // Read time from server
    printf("Reading time...\r\n");
    if (ntp_client.setTime(domain_name, port_number) == 0)
    {
        printf("Set time successfully.\r\n");
        time_t ct_time;
        char time_buffer[80];    
        ct_time = time(NULL) + 7200; // Summer time - Convert to Europe/Amsterdam Time
        set_time(ct_time);
        strftime(time_buffer, 80, "%a %d-%b-%Y %T\r\n", localtime(&ct_time));
        printf("Time            : %s\r\n", time_buffer);
    }
    else
    {
        printf("ERROR: Failed set time.\r\n");
    }

    printf("Demo completed.\r\n");
    wifi.disconnect();
}

Question relating to:

1 Answer

8 years, 8 months ago.

Jack, I can give you a quick fix. Open NTPClient.cpp, find

m_sock.bind(0); Bind to a random port

and change it to

m_sock.bind(123); Bind to a random port

Let me know if it works for you.

Accepted Answer

This reminds me there's an issue for this. I left a note in the cookbook (I might not have included that in the NTP code example, wchih we can add there ).

This is the comment: There's a known issue with a bind to any port (0) for cc3000. Please set the bind address inside NTP client to any port except 0.

posted by Martin Kojtal 18 Aug 2015

Here's a question (I explained NTP mbed client and issue I was having) which has a solution proposed, but not enough, and might have not been fixed since. http://e2e.ti.com/support/wireless_connectivity/f/851/p/247829/1040312

posted by Martin Kojtal 18 Aug 2015

@Martin Please update NTPClient so that the" out of the box experience" works.

posted by David Fletcher 18 Aug 2015

Will fork NTP client and replace bind(0) to a number port ;) like 123

posted by Martin Kojtal 18 Aug 2015

Hi David, thank you for the quick response. That works very well!

Off-Topic: when the cc3000 is connected to the LPCXpresso4337, which is a fast board, it often hangs anywhere, while communicating with the cc3000. Maybe this can be verified by somebody else too? Supply voltages on the shield are fine.

posted by Jack Berkhout 18 Aug 2015

Jack, please close this question, as it has been answered. If you have further issues please ask another question or PM me, and I will take a look. Thanks.

posted by David Fletcher 18 Aug 2015