I see! So, it is reporting a CRC error.
Do you have a low cost RTL-SDR? It could help you to identify what the
TX is sent incorrectly. This LoRa example was working fine. Could it
be some hardware issue?
BR,
Alan
On 3/7/22, 王国柱 <wgz_z...@163.com> wrote:
> Here is to judge whether the data is valid according to the interrupted
> attitude, and it is not realistic to add a print statement。
> nuttx\drivers\wireless\lpwan\sx127x\sx127x.c
>
>
> #ifdef CONFIG_LPWAN_SX127X_RXSUPPORT
> /* RX DONE */
>
>
> case SX127X_OPMODE_RX:
> case SX127X_OPMODE_RXSINGLE:
> {
> /* REVISIT: Always check PAYLOADCRCERR even CRCONPAYLOAD not set
> */
>
>
> if ((irq & SX127X_LRM_IRQ_PAYLOADCRCERR) != 0)
> {
> data_valid = false;
> }
>
>
> if (data_valid)
> {
> ret = sx127x_lora_rxhandle(dev);
> if (ret > 0)
> {
> if (dev->pfd)
> {
> /* Data available for input */
>
>
> dev->pfd->revents |= POLLIN;
>
>
> wlinfo("Wake up polled fd\n");
> nxsem_post(dev->pfd->sem);
> }
>
>
> /* Wake-up any thread waiting in recv */
>
>
> nxsem_post(&dev->rx_sem);
> }
> }
> else
> {
> /* RX Data invalid */
>
>
> wlinfo("Invalid LORA RX data!\n");
> }
> On 3/7/2022 18:02，Alan Carvalho de Assis<acas...@gmail.com> wrote：
> Try to print the received data that generated the "Invalid LORA RX data"
>
> On Monday, March 7, 2022, 王国柱 <wgz_z...@163.com> wrote:
>
> Set power to 14
> Waiting for data
>
> sx127x_lora_isr0_process: ISR0: IRQ = 0x70
> sx127x_lora_isr0_process: Invalid LORA RX data!
>
>
>
>
>
> On 3/7/2022 14:32，王国柱<wgz_z...@163.com> wrote：
> Oh, sorry for the mistake in the email just now, the device running sx127x
> -r has been waiting for data
> Set power to 14
> Waiting for data
>
> sx127x_lora_isr0_process: ISR0: IRQ = 0x70
> sx127x_lora_isr0_process: Invalid LORA RX data!
>
>
> And the device that executes sx127x -t has been sending data,
>
>
>
> sx127x_write: buflen=5
> sx127x_opmode_set: opmode_set 2->2
> Sesx127x_lora_isr0_process: ISR0: IRQ = 0x08
> sx127x_lora_isr0_process: WARNING: Interrupt not processed, opmode=2
> nsx127x_isr0_process: Failed to process ISR0 -22
> d sx127x_opmode_set: opmode_set 2->4
> 5 bytes
> sx127x_lora_isr0_process: ISR0: IRQ = 0x08
> sx127x_opmode_set: opmode_set 4->2
> wait 5 sec ...
>
>
>
>
>
>
> GPIO_SX127X_DIO0 is configured with PC1, how can I debug it now?
> #defineGPIO_SX127X_DIO0
> (GPIO_INPUT|GPIO_FLOAT|GPIO_EXTI|GPIO_PORTC|GPIO_PIN1)
>
>
>
>
> On 3/4/2022 01:14，Alan Carvalho de Assis<acas...@gmail.com> wrote：
> Yes, that is correct.
>
> Which pin did you use to receive interrupt (GPIO_SX127X_DIO0) ?
>
> Try to monitor this pin to see it changes status when other device
> transmit. Also you can double check if the other device is
> transmitting using a RTL-SDR device.
>
> BR,
>
> Alan
>
> On 3/3/22, Prelude <wgz_z...@163.com> wrote:
> When I use it, one device sends a command using 'sx127x -t', and the other
> receives a command using 'sx127x -r'.
> Look at the apps/examples/sx127x_demo/sx127x_demo.c，Is this OK?
>
>
>
>
>
> ---- 回复的原邮件 ----
> | 发件人 | 王国柱<wgz_z...@163.com> |
> | 日期 | 2022年03月03日 12:17 |
> | 收件人 | acas...@gmail.com<acas...@gmail.com> |
> | 抄送至 | dev@nuttx.apache.org<dev@nuttx.apache.org> |
> | 主题 | Re: nuttx lora sx127x device use for help |
> I tested the two devices with an oscilloscope and both have signals, but
> there is no communication between the two devices.
> One is always sending data, and the other is waiting to receive data. Does
> the communication between the two devices need to be networked first?
>
>
> That's what it used to be, but I used two boards to execute sx127x -r on one
> of the boards and sx127x -t on the other, expecting communication between
> the two boards, but it didn't work as expected . Do you need any other
> configuration?
> the first board:
> nsh> sx127x -t
> Start sx127x_demo
> LORA modulation
> Set frequency to 930000000
> Set power to 14
>
> Send 5 bytes
> ........
>
> the sencond boad:
> nsh> sx127x -r
> Start sx127x_demo
> LORA modulation
> Set frequency to 930000000
> Set power to 14
> Waiting for data
> ........
>
>
>
