RTOS/CC2640: Why does CC2640 consume more than CC2540 in connected mode?

Fig 0. CC2540 Connected 60sec

Fig 1. LAUNCXL-CC2650 thermometer Connected 60sec

Fig 2.CC2640 Connected 30sec

Fig 3. CC2640 Shutdown 300sec

Are you only using out of box example? What's the connection parameters for CC2540 and CC2640 devices?
Are those examples you are using identical application wise?

BLE connection parameters for thermometer example:

#define DEFAULT_DISCOVERABLE_MODE GAP_ADTYPE_FLAGS_LIMITED
//#define DEFAULT_DISCOVERABLE_MODE GAP_ADTYPE_FLAGS_GENERAL

// How often to perform periodic event
#define PERIODIC_EVT_PERIOD 1000

// Whether to enable automatic parameter update request when a connection
// is formed.
#define DEFAULT_ENABLE_UPDATE_REQUEST GAPROLE_LINK_PARAM_UPDATE_WAIT_BOTH_PARAMS

// Minimum connection interval (units of 1.25ms) if automatic parameter update
// request is enabled.
#define DEFAULT_DESIRED_MIN_CONN_INTERVAL 200

// Maximum connection interval (units of 1.25ms) if automatic parameter update
// request is enabled.
#define DEFAULT_DESIRED_MAX_CONN_INTERVAL 1600

// Slave latency to use if automatic parameter update request is enabled
#define DEFAULT_DESIRED_SLAVE_LATENCY 1

// Supervision timeout value (units of 10ms) if automatic parameter update
// request is enabled.
#define DEFAULT_DESIRED_CONN_TIMEOUT 1000

// Some values used to simulate measurements
#define FLAGS_IDX_MAX 7 //3 flags c/f -- timestamp -- site

// Length of bd addr as a string
#define B_ADDR_STR_LEN 15

// Delay to begin discovery from start of connection in ms
#define DEFAULT_DISCOVERY_DELAY 1000

// Delay to terminate after connection
#define DEFAULT_TERMINATE_DELAY 60000

// Default Thermometer measurement interval
#define DEFAULT_THERMOMETER_MEAS_DELAY 30

#define DEFAULT_THERMOMETER_IMEAS_DELAY 1000

// Max measurement storage count
#define TH_STORE_MAX 3

#define THERMOMETER_IMEAS_LEN 6
#define THERMOMETER_MEAS_LEN 13

// Thermomometer Task Events
#define THERMOMETER_START_DEVICE_EVT 0x0001
#define THERMOMETER_PERIODIC_MEAS_EVT 0x0002
#define THERMOMETER_PERIODIC_IMEAS_EVT 0x0004
#define THERMOMETER_START_DISC_EVT 0x0008
#define THERMOMETER_DISCONNECT_EVT 0x0010
#define THERMOMETER_STATE_CHANGE_EVT 0x0020
#define THERMOMETER_PASSCODE_EVT 0x0040
#define THERMOMETER_PAIR_STATE_EVT 0x0080
#define THERMOMETER_SERVICE_EVT 0x0100
#define THERMOMETER_KEY_CHANGE_EVT 0x0200

// Task configuration
#define THERMOMETER_TASK_PRIORITY 1
#define THERMOMETER_TASK_STACK_SIZE 868


=======================================================================================================================

BLE connection parameters for my board:

// Advertising interval when device is discoverable (units of 625us, 160=100ms)
#define DEFAULT_ADVERTISING_INTERVAL 160

// Use limited discoverable mode to advertise for 30.72s, and then stop, or
// use general discoverable mode to advertise indefinitely
#define DEFAULT_DISCOVERABLE_MODE GAP_ADTYPE_FLAGS_LIMITED
//#define DEFAULT_DISCOVERABLE_MODE GAP_ADTYPE_FLAGS_GENERAL

// How often to perform periodic event
#define PERIODIC_EVT_PERIOD 1000

// Whether to enable automatic parameter update request when a connection is formed.
#define DEFAULT_ENABLE_UPDATE_REQUEST GAPROLE_LINK_PARAM_UPDATE_WAIT_BOTH_PARAMS

// Minimum connection interval (units of 1.25ms) if automatic parameter update request is enabled.
#define DEFAULT_DESIRED_MIN_CONN_INTERVAL 200

// Maximum connection interval (units of 1.25ms) if automatic parameter update request is enabled.
#define DEFAULT_DESIRED_MAX_CONN_INTERVAL 400

// Slave latency to use if automatic parameter update request is enabled
#define DEFAULT_DESIRED_SLAVE_LATENCY 3

// Supervision timeout value (units of 10ms) if automatic parameter update request is enabled.
#define DEFAULT_DESIRED_CONN_TIMEOUT 600 //1000

// Some values used to simulate measurements
#define FLAGS_IDX_MAX 7 //3 flags c/f -- timestamp -- site

// Length of bd addr as a string
#define B_ADDR_STR_LEN 15

// Delay to begin discovery from start of connection in ms
#define DEFAULT_DISCOVERY_DELAY 1000

// Delay to terminate after connection
#define DEFAULT_TERMINATE_DELAY 3600000 //60000

// Default Thermometer measurement interval
#define DEFAULT_THERMOMETER_MEAS_DELAY 30
#define DEFAULT_THERMOMETER_IMEAS_DELAY 1000
#define DEFAULT_THERMOMETER_FORECAST_DELAY 2000

// Max measurement storage count
#define TH_STORE_MAX 3

#define THERMOMETER_IMEAS_LEN 6
#define THERMOMETER_MEAS_LEN 13
#define THERMOMETER_FORECAST_LEN 6

// Thermomometer Task Events
#define THERMOMETER_START_DEVICE_EVT 0x0001
#define THERMOMETER_PERIODIC_MEAS_EVT 0x0002
#define THERMOMETER_PERIODIC_IMEAS_EVT 0x0004
#define THERMOMETER_START_DISC_EVT 0x0008
#define THERMOMETER_DISCONNECT_EVT 0x0010
#define THERMOMETER_STATE_CHANGE_EVT 0x0020
#define THERMOMETER_PASSCODE_EVT 0x0040
#define THERMOMETER_PAIR_STATE_EVT 0x0080
#define THERMOMETER_SERVICE_EVT 0x0100
//#define THERMOMETER_KEY_CHANGE_EVT 0x0200 //?
#define RELSIB_SERVICE_EVT 0x0200
#define THERMOMETER_FORECAST_EVT 0x0800


// Task configuration
#define THERMOMETER_TASK_PRIORITY 1
#define THERMOMETER_TASK_STACK_SIZE 868

#define DEFAULT_ADVERTISING_INTERVAL          160
#define DEFAULT_DISCOVERABLE_MODE             GAP_ADTYPE_FLAGS_LIMITED

#define DEFAULT_DESIRED_MIN_CONN_INTERVAL     200
#define DEFAULT_DESIRED_MAX_CONN_INTERVAL     400

#define DEFAULT_DESIRED_SLAVE_LATENCY         10
#define DEFAULT_DESIRED_CONN_TIMEOUT          1000

Nothing changed!!!

Power Consumption CC2640 in connected mode  ,  more then CC2540

Hi,

Can i reduce the frequency for Cotrex-M3 in connected mode?

I need to reduce the power consumption in connected mode for CC2640

Because my old board CC2540 has power consumption  ~100uA in connected mode.   - Good!

But new board CC2640 and LAUNCHXL-CC2650  has power consumption  ~200uA in connected mode.     - Bad. More!

I think it's because of:
#define DEFAULT_ENABLE_UPDATE_REQUEST GAPROLE_LINK_PARAM_UPDATE_WAIT_BOTH_PARAMS

Try to use
GAPROLE_LINK_PARAM_UPDATE_INITIATE_BOTH_PARAMS

and capture an BLE air sniffer trace (not HCI dump) to confirm which link params are in use.

Best wishes

Hi,

thanks for the answer

// Whether to enable automatic parameter update request when a connection is formed.
#define DEFAULT_ENABLE_UPDATE_REQUEST         GAPROLE_LINK_PARAM_UPDATE_INITIATE_BOTH_PARAMS //GAPROLE_LINK_PARAM_UPDATE_WAIT_BOTH_PARAMS

nothing changed

Now i can't capture an BLE air sniffer trace  :-(

closing the thread due to inactivity.